[DOXIATOOLS-47] removed encoding parameters from site descriptor methods

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-tools/trunk@1604423 13f79535-47bb-0310-9956-ffa450edef68
[DOXIATOOLS-48] don't read parent site.xml if inheritance not expected

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-tools/trunk@1604424 13f79535-47bb-0310-9956-ffa450edef68
code simplification

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-tools/trunk@1604425 13f79535-47bb-0310-9956-ffa450edef68
code simplification

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-tools/trunk@1604426 13f79535-47bb-0310-9956-ffa450edef68
fix when decoration is null

git-svn-id: https://svn.apache.org/repos/asf/maven/doxia/doxia-tools/trunk@1604427 13f79535-47bb-0310-9956-ffa450edef68