Google Search extension v0.1 for MediaWiki
GoogleSearch v0.1.1 : Search bar size fixed to 12px instead of 15px to avoid bad browser interpretation
Correcting Mediawiki link extension website
Version 0.3 : Adding a var to avoid editing the code
v0.4 compatible with MediaWiki 1.21

Detection of wfLoadExtensionMessages which was deprecated since 1.16
and now removed. It now not used anymore when MediaWiki version is
greater or equal to 1.16.
Version 0.5 compatible with Mediawiki 1.23.0