Fix Sublime Text project file in Windows

Windows uses "\" characters to separate directories and Sublime Text
treats them as escape characters. Previously, project files needed to be
manually corrected.

This commit fixes the behavior by using a simple StringTools.replace
call to replace all "\"s with "\\".
Merge pull request #41 from Zshazz/zshazz_fix_subl_windows

Fix Sublime Text project file in Windows