Kallithea issues archive

Kallithea features a profiling feature but it is not well documented. In order to enable it one should set 'pdebug' to true, then at the bottom of each page will be the profiling output.

This should be mentioned in the ini file and the documentation.

Additionally, this feature requires the 'objgraph' python package which is not detected automatically. Not sure how to handle this, but it should be documented in any case.