Update msvs_env.bat to include VS2013 paths (issue #1304).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1725 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Windows: Fix execution of keyboard shortcuts (issue #1299).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk/cef3@1728 5089003a-bbd8-11dd-ad1f-f1f9622dbc98