Adapted CSS tag name validator to use HTML schema
Added CSS attribute value completion
Cleanup
Improved the attribute name filter
Moved commands around and removed old code comments
LESS: Fix relative @import compilation

Fixes #10

This was caused by improper normalization of Windows filepaths in two
places.
Removed redundant To Upper- and Lower Case commands
Bumped version for next VS Gallery release
Don't assume that directories have no extensions

Or that extensionless files are directories
Add detail tooltips in URL picker
URL-encode paths from filesystem
Make project path case-insensitive

Documents loaded with the solution can have inconsistent casing.
Updated references and aligned GUIDs
Removed gallery search. Wasn't used
Upgrade to LESS v1.4.1

Relative imports should now work.
Fixes #29
JSDoc: Allow tabs as separators
JSDoc: XML-escape descriptions

Beware: Using new RegExp('&|<|>|"', 'g') crashes VS.
Added sublemental schema support
Added OpenGraph og:type value intellisense
Handle tabs in JSDoc comments

I can't use \s because that matches newlines too.