OSQA-538, fixing the IE caching issues, now we append the Nocache random number to...

OSQA-538, fixing the IE caching issues, now we append the Nocache random number to the AJAX query, rather than to the whole JavaScript file. Also changed a bit the vote_post logic to ensure that the increment of the node reputation will happen only by one (in the previous implementation increment by 2 or -2 was also possible).

git-svn-id: http://svn.osqa.net/svnroot/osqa/trunk@954 0cfe37f9-358a-4d5e-be75-b63607b5c754