Implementing demur's fix for handling relation parameter between different terms for the same taxon.

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1023502 b8457f37-d9ea-0310-8a92-e5e31aec5664
Adding Finnish translation.

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1024498 b8457f37-d9ea-0310-8a92-e5e31aec5664
Slight improvement in regex efficiency

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026102 b8457f37-d9ea-0310-8a92-e5e31aec5664
Adding demur's work on improved taxa query (add support for specifying relationship between multiple items in a single taxon)

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026103 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixing call to sanitizeOperator which only has one parameter, but was being invoked with two

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026112 b8457f37-d9ea-0310-8a92-e5e31aec5664
* Fixing some bugs introduced in the most recent commit.
* Enhanced toBool() to handle int values

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026271 b8457f37-d9ea-0310-8a92-e5e31aec5664
* Cleaned up handling of custom CSS
 + Static CSS file is now always included
 + If present, custom CSS is now printed in header instead of awkwardly including like before

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026421 b8457f37-d9ea-0310-8a92-e5e31aec5664
Updating README to include info about new taxa relationship syntax and changelog updates for 2.3

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026424 b8457f37-d9ea-0310-8a92-e5e31aec5664
Nowdoc => heredoc in order to support PHP older than 5.3.0

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026457 b8457f37-d9ea-0310-8a92-e5e31aec5664
Minor. Just doing some cleanup.

git-svn-id: http://plugins.svn.wordpress.org/document-gallery/trunk@1026462 b8457f37-d9ea-0310-8a92-e5e31aec5664