exampleSite: Add examples of selected talks and feature/skill widgets

exampleSite/content/home/skills.md

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+# Feature/Skill widget.
+widget = "featurette"
+active = false
+date = "2017-11-21"
+
+# Order that this section will appear in.
+weight = 20
+
+# Add/remove as many `[[feature]]` blocks below as you like.
+# See `config.toml` for more info on available icons.
+
+[[feature]]
+  icon = "files-o"
+  icon_pack = "fa"
+  name = "Data Driven"
+  description = "..."
+  
+[[feature]]
+  icon = "pencil"
+  icon_pack = "fa"
+  name = "Math"
+  description = "..."
+
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exampleSite/content/home/talks_selected.md

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+# Selected Talks widget.
+widget = "talks_selected"
+active = false
+date = 2016-04-20T00:00:00
+
+title = "Selected Talks"
+subtitle = ""
+
+# Order that this section will appear in.
+weight = 29
+
+# List format.
+#   0 = Simple
+#   1 = Detailed
+list_format = 0
++++