There is an optional issue_tracker_url setting that can be set in
meta/main.yml:galaxy_info. Include it in the generated template
commented out so that it can be filled out if desired.

Conflicts:
	lib/ansible/modules/core
	lib/ansible/modules/extras

Fixes #9236

Since support for non-galaxy templates is available in 1.8, the existing
comment in the default_meta_template requiring specified dependencies be
available via galaxy was no longer valid. That comment is now removed.

using this (for testing purpose) :
  $ ansible-galaxy install COPYING
  - error: the file downloaded was not a tar.gz
  - COPYING was NOT installed successfully.
  - you can use --ignore-errors to skip failed roles.

this result in COPYING being erased, which is surprising for the user.
This also prevent erasing requirements.yml if someone use the wrong flag.

This change fixes hg galaxy roles
Roles also get installed if roles path is missing, which
the tests currently require (fixes #8950)

fixes #8823
	modified:   bin/ansible-galaxy

Fixes #8890

Fixes #8884

Defaults to the system wide `roles-path` when `path` is not specified in the
provided `role-file`.  An example installing nginx to a relative path specified
by the `role-file`.

    - src: https://github.com/bennojoy/nginx
      path: vagrant/roles/

`ansible-galaxy init --offline ...` can create a role without
talking to the galaxy api server
`ansible-galaxy install ...` only needs to talk to the galaxy api
server for galaxy roles, not tar files or scm archives
Fixed a bug in command line role installation

Older git archive commands create tar archives even with a tar.gz
extension. So change it to always create tar archives and have
the install_role method cope.

Removed ssh roles from the test case as they don't work unless
you can connect to bitbucket via ssh and have your key there.

Corrected a minor typo in error messages

Added docs
Added more tests
Improved how roles are returned from the parsers

* Roles can now be given a friendly name as third field in role spec csv
* Roles can be installed from URL (not just from archived SCMs)
* Integration tests to demonstrate this
* Unit tests to ensure that role spec parsing works as expected

Moved repo_url_to_role_name to common method in ansible.utils
Added unit test for repo_url_to_role_name
Added integration tests for galaxy

Change SCM determination from executing git/hg commands to explicit
in URL.

Fix check for already installed dependencies

ansible-galaxy can now refer to SCM URLs (git and hg at this point)
for role names
Dependencies need to use the full SCM URLs too.
Otherwise all seems to work well

Test rolesfile
```
http://bitbucket.org/willthames/git-ansible-galaxy,v1.1
https://bitbucket.org/willthames/hg-ansible-galaxy
```
(works with ssh too)

A fairly trivial change since `Role Name` and `Example Playbook`
will likely be modified anyways.  However, since all the other
sections are aligned properly, felt it would be nice to "clean this up".

Before:

    Role Name
    ========

    Example Playbook
    -------------------------

After:

    Role Name
    =========

    Example Playbook
    ----------------

timeit shows a speedup of ~3x on Python 2.7.5 x86_64.
It also makes the code a bit shorter.

Fixes 5397

This may still be an issue if users create roles with a '.' in the name though.
We will probably have to disallow that in the role naming convention.