diff --git a/_ext/svg/invisible.svg b/_ext/svg/invisible.svg
new file mode 100644
index 0000000..349463b
--- /dev/null
+++ b/_ext/svg/invisible.svg
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 469.44 469.44" style="enable-background:new 0 0 469.44 469.44;" xml:space="preserve">
+<g>
+	<g>
+		<g>
+			<path d="M231.147,160.373l67.2,67.2l0.32-3.52c0-35.307-28.693-64-64-64L231.147,160.373z"/>
+			<path d="M234.667,117.387c58.88,0,106.667,47.787,106.667,106.667c0,13.76-2.773,26.88-7.573,38.933l62.4,62.4
+				c32.213-26.88,57.6-61.653,73.28-101.333c-37.013-93.653-128-160-234.773-160c-29.867,0-58.453,5.333-85.013,14.933l46.08,45.973
+				C207.787,120.267,220.907,117.387,234.667,117.387z"/>
+			<path d="M21.333,59.253l48.64,48.64l9.707,9.707C44.48,145.12,16.64,181.707,0,224.053c36.907,93.653,128,160,234.667,160
+				c33.067,0,64.64-6.4,93.547-18.027l9.067,9.067l62.187,62.293l27.2-27.093L48.533,32.053L21.333,59.253z M139.307,177.12
+				l32.96,32.96c-0.96,4.587-1.6,9.173-1.6,13.973c0,35.307,28.693,64,64,64c4.8,0,9.387-0.64,13.867-1.6l32.96,32.96
+				c-14.187,7.04-29.973,11.307-46.827,11.307C175.787,330.72,128,282.933,128,224.053C128,207.2,132.267,191.413,139.307,177.12z"
+				/>
+		</g>
+	</g>
+</g>
+</svg>
diff --git a/_ext/svg/lockedpadlock.svg b/_ext/svg/lockedpadlock.svg
new file mode 100644
index 0000000..41efee9
--- /dev/null
+++ b/_ext/svg/lockedpadlock.svg
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="486.733px" height="486.733px" viewBox="0 0 486.733 486.733" style="enable-background:new 0 0 486.733 486.733;"
+	 xml:space="preserve">
+<g>
+	<path d="M403.88,196.563h-9.484v-44.388c0-82.099-65.151-150.681-146.582-152.145c-2.225-0.04-6.671-0.04-8.895,0
+		C157.486,1.494,92.336,70.076,92.336,152.175v44.388h-9.485c-14.616,0-26.538,15.082-26.538,33.709v222.632
+		c0,18.606,11.922,33.829,26.539,33.829h321.028c14.616,0,26.539-15.223,26.539-33.829V230.272
+		C430.419,211.646,418.497,196.563,403.88,196.563z M273.442,341.362v67.271c0,7.703-6.449,14.222-14.158,14.222H227.45
+		c-7.71,0-14.159-6.519-14.159-14.222v-67.271c-7.477-7.36-11.83-17.537-11.83-28.795c0-21.334,16.491-39.666,37.459-40.513
+		c2.222-0.09,6.673-0.09,8.895,0c20.968,0.847,37.459,19.179,37.459,40.513C285.272,323.825,280.919,334.002,273.442,341.362z
+		 M331.886,196.563h-84.072h-8.895h-84.072v-44.388c0-48.905,39.744-89.342,88.519-89.342c48.775,0,88.521,40.437,88.521,89.342
+		V196.563z"/>
+</g>
+</svg>
diff --git a/_ext/svg/unlockedpadlock.svg b/_ext/svg/unlockedpadlock.svg
new file mode 100644
index 0000000..e1d2e92
--- /dev/null
+++ b/_ext/svg/unlockedpadlock.svg
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 16.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 width="486.866px" height="486.866px" viewBox="0 0 486.866 486.866" style="enable-background:new 0 0 486.866 486.866;"
+	 xml:space="preserve">
+<g>
+	<path d="M393.904,214.852h-8.891v-72.198c0-76.962-61.075-141.253-137.411-142.625c-2.084-0.038-6.254-0.038-8.338,0
+		C162.927,1.4,101.853,65.691,101.853,142.653v1.603c0,16.182,13.118,29.3,29.3,29.3c16.182,0,29.299-13.118,29.299-29.3v-1.603
+		c0-45.845,37.257-83.752,82.98-83.752s82.981,37.907,82.981,83.752v72.198H92.963c-13.702,0-24.878,14.139-24.878,31.602v208.701
+		c0,17.44,11.176,31.712,24.878,31.712h300.941c13.703,0,24.878-14.271,24.878-31.712V246.452
+		C418.783,228.989,407.607,214.852,393.904,214.852z M271.627,350.591v63.062c0,7.222-6.046,13.332-13.273,13.332h-29.841
+		c-7.228,0-13.273-6.11-13.273-13.332v-63.062c-7.009-6.9-11.09-16.44-11.09-26.993c0-19.999,15.459-37.185,35.115-37.977
+		c2.083-0.085,6.255-0.085,8.337,0c19.656,0.792,35.115,17.978,35.115,37.977C282.717,334.149,278.637,343.69,271.627,350.591z"/>
+</g>
+</svg>
diff --git a/_ext/svg/visible.svg b/_ext/svg/visible.svg
new file mode 100644
index 0000000..39652fb
--- /dev/null
+++ b/_ext/svg/visible.svg
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="iso-8859-1"?>
+<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
+<svg version="1.1" id="Capa_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
+	 viewBox="0 0 469.333 469.333" style="enable-background:new 0 0 469.333 469.333;" xml:space="preserve">
+<g>
+	<g>
+		<g>
+			<path d="M234.667,170.667c-35.307,0-64,28.693-64,64s28.693,64,64,64s64-28.693,64-64S269.973,170.667,234.667,170.667z"/>
+			<path d="M234.667,74.667C128,74.667,36.907,141.013,0,234.667c36.907,93.653,128,160,234.667,160
+				c106.773,0,197.76-66.347,234.667-160C432.427,141.013,341.44,74.667,234.667,74.667z M234.667,341.333
+				c-58.88,0-106.667-47.787-106.667-106.667S175.787,128,234.667,128s106.667,47.787,106.667,106.667
+				S293.547,341.333,234.667,341.333z"/>
+		</g>
+	</g>
+</g>
+</svg>