re-captcha: adjust for v2 that is the only left one supported since 1st of May.

nix: added python link for building wrapped python. - allows some nicer debugging using pycharm for example - disabled by default.

dependencies: bumped rhodecode-tools to 0.15.0 + urllib3 to 1.21

audit-logs: store properly IP and user for certain comments types. - before mostly IP could be missing from audit log data.

admin users and admin users group: add number of inactive users/users_group, resolves #5454

datatables: use new way of generating labels for count of dynamic datatables. - according to docs this is a better way. We'll use this in other places with some added changes.

email: added help block on where to change email settings

mercurial: protocol security updates. - fixes Mercurial CVE for lack of permissions checking on mercurial batch commands - more strict checks for permissions, now default to push instead of pull to be always on safe side. - decypher batch commands and pick top-most permission to be used

dependencies: bumped python-dateutil to 2.7.2

dependencies: bumped plaster-pastedeploy to 0.5