Refactor the project clone panel

I have no earthly idea what this file was for, but I couldn't find it being
rendered anywhere.

Replaces two calls that this method simplifies

Add tmp/.gitkeep file to ensure tmp folder exists on clone

Clean up doc/installation.md

Closes #939

The install guide lists it as a requirement, so we might as well have it
by default.

Closes #1072

Changes to text in API documentation

use APP_ROOT in init-gitlab to specify root of project

Change @project instance variable to a local in views/help/markdown

It was erroneously appending the project name to the page's title, even
though the Help system isn't specific to one project.

Update User#identifier to conform to Gitolite 2.x's user pattern

Also modifies the specs a bit because I can't help myself.

Closes #480

[ci skip]

API pagination

API for new project creation

Update the references to the script and refer to it from the installation manual.

Update the references to the script and refer to it from the installation manual.

Indent the code block.

Trivial fix to docs/installation.md

Non interactive aws install

Give Resque route a name and use that for the iframe src

GFM spec redesign

Should now be much clearer about what each spec is actually testing.
For example, instead of testing stuff like link classes and titles in
every single call, we only test those things once, in their own specs.