added applications shortcut to dmg, prevented synergy from opening in /Volumes/, attempted fix for os x 10.8 would show assistive devices warning even if enabled.

git-svn-id: http://svn.synergy-foss.org/trunk@1933 33c40d52-04ba-11de-a43f-ff96a2b7a9af
ignored synwinxt.dll when it already exists, seems to be extremely difficult to replace dll's loaded into explorer (restarting explorer from nsis didnt work).

git-svn-id: http://svn.synergy-foss.org/trunk@1934 33c40d52-04ba-11de-a43f-ff96a2b7a9af
make sure synwinxt.dll can only be loaded on vista and above

git-svn-id: http://svn.synergy-foss.org/trunk@1935 33c40d52-04ba-11de-a43f-ff96a2b7a9af
ignore --enable-drag-drop below vista and on linux

git-svn-id: http://svn.synergy-foss.org/trunk@1936 33c40d52-04ba-11de-a43f-ff96a2b7a9af
fixed: ignore --enable-drag-drop includes os major 6 (vista family)

git-svn-id: http://svn.synergy-foss.org/trunk@1937 33c40d52-04ba-11de-a43f-ff96a2b7a9af