common/build_style: adding python_versions variable

This variable contains the versions of python for which this packages
will be built. Multiple versions can be seperated by whitespace.
mariadb: update to 5.5.37.
ansible: URL has changed; correcting distfiles
python-distribute: build python3 modules too
python-Markups: build python3 modules too
python-distribute: revbump; adding short_desc to subpkg
python-Markups: revbump; adding short_desc to subpkg
python-Markups: python3 subpkg is noarch too.
python-distribute: python3 subpkg is noarch too.
Manual.md: add naming conventions and describe python_versions variable
Manual.md: themselfes -> themselves; another grammar tweak.
nodejs: update to 0.10.27.
runit-void: bump version.
Manual: describe python_versions a bit more.
Manual.md: describe install phase a bit more.
common/shlibs: add libs for the following commits
New package: python3-shiboken
New package: python3-pyside
python-Markdown: build python3 module too
python-Markups: changing short_desc