Add ruby version to gem install for rbenv

- Adds ability to specify which version of ruby to install gems into
- Similar feature to the rvm version
- Allows installing and managing multiple ruby versions
Limit pygit2 gitfs provider transports

pygit2 doesn't yet support ssh transports properly, as seen here:

http://stackoverflow.com/questions/20956895/how-do-i-set-ssh-credentials-for-libgit2-libssh2

This commit limits pygit2 to http://, https://, and file:// URIs. Once a
compatible pygit2 version is released, we can do version checking and
allow ssh-based transports for pygit2 on supported versions.
Add more state vs module clarification
Adding the ability to delete iptables rules from the iptables state.  Deletes can be made in a state file using syntax similiar either the insert or an append. If the position argument is included then the delete is based on the position, without it is based on the rule.
Merge pull request #9619 from terminalmage/pygit2-ssh

Limit pygit2 gitfs provider transports
Merge pull request #9623 from basepi/moduledocs

Add more state vs module clarification
Add rehash method for rbenv module

- After installing gems or rubies, rbenv rehash should be run
- No harm in running it multiple times or when not strictly needed in
  the do method.
Fix file.managed traceback when source is a list

If file.managed state has a source param which is a list, and none of
the URIs in that list are found, a traceback occurs. This commit
modifies salt.modules.file.source_list to raise an exception when source
is a list and no matches are found, and then catches that exception in
the file.managed state so that Salt can return gracefully with a False
result and meaningful error message.
Fix source list issue for file.recurse states

This commit fixes #9620 for file.recurse states. The bug report was for
file.managed, but the same issue would be encountered in file.recurse
states.

Also, some of the input validation for file.recurse has been improved
and cleaned up.
Updated windows docs with a quick note to mention that the installers will install deps.
Fix versionadded:: for filter_by() "default=" parameter

This parameter has been introduced by commit dbfe790a, which has not
been merged in 0.17 branch. Only in 2014.1.
Merge pull request #9631 from tmartinfr/fix-doc-filter_by

Fix versionadded:: for filter_by() "default=" parameter
Fix version naming.
Merge pull request #9630 from gravyboat/develop

Windows installation doc update explaining deps will be installed.
Speeds up query of processes by using powershell to query all services at once rather than running a separate process for each service.
on windows, switch so that colors are off by default, since it isn’t supported by the default console.  —force-color can still be used if it is needed.
Move the transport system in file client to not reuse zeromq sockets
Merge pull request #9633 from thematthopkins/windows_no_colors_default

On windows, switch so that colors are off by default
Fix #6306

Properly warn if the minion could not reach the master and prevent the
minion from stack tracing
Merge pull request #9621 from amco/add-ruby-version-to-rbenv.do

Add ruby version to gem install for rbenv