Add block negation query parameter

Like with player names, you can now precede a block name with "!" to query for all except the specified blocks.
Fixes #452, #216
Typo in block negation code
Fix showing creations of non-specified block in exlude mode with destroy query, and vice versa
Merge branch 'master' of https://github.com/frymaster/LogBlock.git
Allow use of area parameter with loc parameter, as long as loc is specified first