add Windows installer and shell changes needed to add Brackets to the Windows Explorer 'Open With...' menu and dialog for supported file types
Merge remote-tracking branch 'origin/master' into bchin/open-with-brackets-from-windows-explorer-no-msi
added missing .txt extension from installer script
when opening a file in an already running instance of Brackets, restore the application window if Brackets is minimized
launch new instance of Brackets if the current one is disabled (eg. modal dialog) or if we can't find the Brackets window
code cleanup per code review requests
refactoring function name to better describe the refactored behavior
re-indenting to fix VS2010 tabs
refactoring per code review
Merge pull request #299 from adobe/bchin/open-with-brackets-from-windows-explorer-no-msi

Implement Windows Explorer "Open with..." option (no .msi)
update README for linux
Merge pull request #302 from adobe/jasonsanjose/sprint30

update README for linux