Fixed #850: RELAX NG list definitions for "context" and "environment" attributes of <configuration> element allow only one value
documentation fixes
Merged revisions 84607a70cad6b3134dc6db26fd86d248cae8b20e,b1a6bacf498b62b3c3c499b7a408b97b6e214a5a via svnmerge from 
http://svn.agavi.org/branches/1.0