metatags_quick 7.x-2.0-beta1

First and most important - upgrade path from nodewords is working (only for keywords and description).
Multiple issues were addressed:
#1211804: Hide "Edit meta tags" tab if path-based meta tags are disabled
#1215786: "Edit Meta Tags" tab on taxonomy term edit page - thanks to christinawithout for pointing right solution
#1165096: Upgrade path from nodewords (D6) - maxiorel
#1215762: Administer Meta Tags permission
This release was hardly possible without help of maxiorel (who wrote original code for nodewords upgrade) and other people actively discussing open issues: christinawithout, zambrey and others.
Thank you all!

Things that need to be addressed before 2.0 release:
* upgrade path for meta tags other than keywords/description
* intelligent change of path based tags when target path changes (have no clue how to achieve that, actually)