Merge pull request #1453 from am11/master

Bundle: Add file when it doesn't exists (#1384)
Suppress first-chance exception on initial load
Fix C# embedding in Markdown editor
Speed up slow pre-build task

xregexp does not have any executables, so it was
always installing & re-packing everything.
Fix Markdown compilation & test
Fix incorrect assumptions in LESS compilation test
Merge pull request #1455 from SLaks/misc-fixes

Misc fixes