mkrelease.sh: Update sed command to work after commit b1197c9964a7122477e94cf26a6f63b20f636d31.
runtests.sh: Add 3.4 to PYTHON_SUPPORTED_VERSIONS and 3.5 to PYTHON_VERSIONS.
pym/_emerge/main.py: Fix --moo output

Fixes bug introduced by:
* commit a830a9acaa265a9558f1fa9aeaa3f814631494b9
| Summary:    Whitespace cleanup
| Author:     Brian Dolbec <dolsen@gentoo.org>
| AuthorDate: Mon Jan 6 23:56:30 2014 -0800
| CommitDate: Sat Mar 1 19:11:02 2014 -0800