attempted fix for Enum DropDownList documentation
Update index.md

Removed whitespace from YAML
migrated Country Codes Documentation from CodePlex
updated Enum DropDownList markdown syntax
migrated File DropDownList documentation from CodePlex
applied styling to SQL AutoComplete documentation
migrated SQL CheckBoxList documentation from CodePlex
migrated SQL DropDownList documentation from CodePlex
migrated SubTabs documentation from CodePlex
migrated XPath AutoComplete documentation from CodePlex
Corrected typo in `ParseXhtml` example
added XPath Templatable List documentation example using members
updated XPath Templatable List documentation - added Text Template description
XPath Templatable List - escaped { symbols
XPath Templatable List - removed code block indentation for example containing curly braces
XPath Templatable List - re-added backslash escapes
XPath Templatable List - example XML
XPath Templatable List - typo fix
Enum CheckBoxList and Enum DropDownList documentation
Enum datatypes typo fixes