fix regex used for obtaining list of modules files from 'available --terse' output, and document it thoroughly
clean up unit tests for modules.py, make sure test with long module path runs first (required for Lmod)
list all sources used for unit tests in manifest
figure out absolute path for module command and use it, prefix modulecmd.tcl with tclsh to make it robust against older versions of modulecmd.tcl that don't have a proper hashbang
add option to tweak stdout of module command before exec'ing it, use it for modulecmd.tcl