Merge pull request #336 from plq/master

Push conversion of Html* classes
Merge remote-tracking branch 'plq/master'
minor
implement topological sorting for schema generation
replace dict comprehension in toposort for python 2.6
remove deps once done with it
update ws-i report. everything seems in order
Merge pull request #353 from plq/toposort

use topological sort for entities that will go to the xml schema.