Merge branch 'master' of https://github.com/haimshalev/HebrewCQPweb
1. add button Not '!', appand operator Not to current word;
2. add button No Prefixes, find words with no prefixes (prefix1="NNN" & prefix2="NNN"...);
not reset the gui menu after computing a query, writing query, reloading the page
change the label of the base Type drop List to 'POS'
Merge branch 'master' of https://github.com/haimshalev/HebrewCQPweb
add undo button, undo last query compute
Updated the subcorpora to be global to all users and not per user.
Also set the permission to edit subcorpora only to the administrator.