precompile pyc files (Issue #6)

precompile pyc files for rovorweb on installation
to improve performance
set up for optional optimazation of compilation (issue #6)

if you set pcompile_options to -O it will remove execution of asserts
and if you set it to -OO it will also remove docstrings,
this may have some memory gains, and possibly some small speed gains
but isn't enabled by default