Update dates in recently changed files.
As per bug #472104 add option --verbose-slot-rebuilds=y|n
Whitespace cleanup
man/ebuild.1: Add --verbose-slot-rebuilds option.
portage/emaint/main.py: Fix a bug in the options parsing.
man/make.conf.5: Fix misinformation (bug 504532)
makerelease.sh: Add --user option for the scp upload.
Update release notes.
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
Fix bug in _remove_pkg logic (bug 505422)
_compute_abi_rebuild_info: deal with non-Package parents
DEVELOPING: Cap at 72 columns
DEVELOPING: Add note on commits
DEVELOPING: Add note on commit messages
DEVELOPING: Be more specific about tabs/spaces
Remove some broken old-style virtual code

Fixes a crash reported on IRC
dbapi/vartree.py: whitespace cleanup
writeable_check.py: Fix RO check (bug 505428)

Use /proc/self/mountinfo which only contains the relevant chroot mounts.
Mountinfo changes are thanks to jcallen for the valuable info he provided.