replacing File>Open Folder implementation of SHBrowseForFolder() with IFileDialog+FOS_PICFOLDERS
adding comments and flag to prevent from adding chosen folder to MRU
toggle between old and new file dialog based on current OS
Merge remote-tracking branch 'origin/master' into bchin/open-folder-using-IFileDialog
Protect against detached browser.
Merge pull request #249 from adobe/glenn/crash-on-refresh

Fix potential crash when reloading Brackets
Merge pull request #247 from adobe/bchin/open-folder-using-IFileDialog

Update "File > Open Folder..." dialog with Windows' Open File dialog in pick folders mode.
grunt set-sprint --sprint=26
Merge pull request #250 from adobe/jasonsanjose/sprint26

grunt set-sprint --sprint=26
Remap F1-F15 keys in shortcuts to Mac-specific function keys.
Merge pull request #253 from adobe/rlim/function-keys

Remap F1-F15 keys in shortcuts to Mac-specific function keys.
removing dependency on atlbase.h by removing unnecessary use of CComPtr
piggy-backing removal of TODO comment previously identified by PR# 247
Merge pull request #254 from adobe/bchin/issue-4077

Fix for Issue #4077- "brackets-shell: Can't build on Windows"