Merge pull request #427 from SLaks/misc-fixes

Cleanup Node modules, add JSHint unit tests
Image QuickInfo: Fixed file locking issue
Added image pasting support to HTML/CSS

This allows you to paste images from the clipboard directly onto the
HTML/CSS editor. When doing so, you will be prompted to save the file
and WE will automatically insert <img> tag or CSS property respectively.
Paste Image: Removed unneeded null check
LESS/Coffee: Removed compile enabled option

"Compile on save" and "Compile on build" made this setting redundant.
Also, it wasn't used by the MarginBase
Margins: Removed the MarginName property

This was redundant since the GetType() call already provides the name of
the class.
PreBuild: Only flatten after installing modules

Fixes #428
JSHint: Remove space from backup folder

This was messing up escaping in the VSIX