Added proper detection of Alias plugin. Added addition of search aliases in configure.
Added proper detection of Alias plugin.
Added addition of search aliases in configure.

Ban3/Limnoria,mazaclub/mazabot-core,jeffmahoney/supybot,mazaclub/mazabot-core,prashantpawar/supybot-rothbot,Ban3/Limnoria,raboof/supybot,ProgVal/Limnoria-test,haxwithaxe/supybot,buildbot/supybot,frumiousbandersnatch/supybot-code,ProgVal/Limnoria-test,kblin/supybot-gsoc