Change title to more specific "Developing ManageIQ"

The new header matches the corresponding "Using ManageIQ" in manageiq.org/documentation
Revise header according to Oleg's suggestion
Merge pull request #13 from dneary/patch-1

Change title to more specific "Developing ManageIQ"
changed all instances of "Github" to "GitHub"

"GitHub" is the proper name of the site. It should either only be referred to as "github.com" when in a URL (including git) or as "GitHub" (the proper name). 

It should never be referred to as "Github".
Merge pull request #14 from garrett/patch-1

changed all instances of "Github" to "GitHub"
Fix typos.
Merge pull request #15 from jrafanie/fix_typos

Fix typos.
Added Current Sprint doc
Merge pull request #16 from chessbyte/current_sprint

Added Current Sprint doc
Added Current Sprint to Readme
Merge pull request #17 from chessbyte/add_current_sprint_to_readme

Added Current Sprint to Readme
spaces are required in Markdown ATX-style headers

According to most Markdown implementation specifications, spaces are needed in ATX-headers. 

(Kramdown, the implementation of Markdown used on the ManageIQ.org, now implements this strictly.)
Added automate copy feature and altered import/export assignment
Adding Documentation for Enabling External Authentication

Adding ManageIQ/Guides for installing and enabling
external authentication via IPA.
Merge pull request #19 from dclarizio/sprint_8_changes

Added automate copy feature and altered import/export assignment
Merge pull request #18 from garrett/patch-1

spaces are required in Markdown ATX-style headers
Current_sprint.md statement of purpose

@garrett suggested a summary at top of doc
Merge pull request #23 from mfeifer/current_sprint

Current_sprint.md statement of purpose
PR Review Changes to the External Authentication Guide.
Updating REST API Reference to mention Request Tasks

- For completeness and reflecting the /api/request_tasks collection.