Compilers: Fix #498

Some project systems don't like paths with forward slashes
Merge pull request #500 from SLaks/misc-fixes

Compilers: Fix #498
v.1.7.1
Sprite: Changed coordinates. Fixed #508
SASS: Crash in editor when typing /. Fixed #510
Sprite: Fixed mixed DPI issue.

All images in the sprite now defaults to the system DPI settings
Sprite: Changed behavior for DPI fix
CoffeeScript: Reversed --bare option. Fixed #480
Margin: Show preview without save. Fixed #507
Sprite: Added description comment
Minify: Handle unsupported file types. Fixed #522
LESS: Windows Store exception. Fixed #499
Tests: Change fixtures; now passing all tests.
Merge pull request #525 from am11/master

Tests: Change fixtures; now passing all tests
Merge branch 'master' of https://github.com/madskristensen/WebEssentials2013
Compiler: No compile when checked out. Fixed #514
ProjectCompiler: Ignore known paths #511

This might fix the issue and the ignore list should be honored anyway
Compiler: Ignore reversal
JavaScript: Improved condition for outlining.
Merge pull request #528 from am11/master

JavaScript: Improved condition for outlining (#526)