Added AgaviContext::createInstanceFor(), closes #857
reverting bad commit in 41fbff29a945e2b6761556d6f2712c6ca3142111, refs #857
Added AgaviContext::createInstanceFor(), closes #857, this is a proper version of the faulty commit in 41fbff29a945e2b6761556d6f2712c6ca3142111
Merged revisions 41fbff29a945e2b6761556d6f2712c6ca3142111...859325fbb65e360067df3b36e5806e2f54613b17,bed57364ac50d1fdfff80f82f6aef37254564a17 via svnmerge from 
http://svn.agavi.org/branches/1.0