Added entry for Domain Specific Language, and glossary link
Add definition for CLI
Minor grammar changes
Update identity_management.rst: Content

Some blurbs about Active Directory & LDAP. I apologize if the build
fails again, but I'm having some trouble getting sphinx working.
Formatting Changes

Fixed the links and bulleted lists. Successfully ran make HTML with 0
warnings or errors.
Merge branch 'master' of https://github.com/opsschool/curriculum
Expand on Datbases 101, small grammar changes, add MySQL specific examples
Changes and tweaks to 80 width
Update backups.rst
Briefly flesh out Virtualization 101.

Add mention of private and public cloud, as well as defining terms.
Merge branch 'Database' of https://github.com/twirrim/curriculum into twirrim-Database
fixing stlye, highlighting and reformatting some paragraphs
Merge remote-tracking branch 'upstream/master'
adding info on June filming schedule
Merge pull request #142 from avleen/introduction

adding info on June filming schedule
Typo in filesystems_101.rst
Merge pull request #143 from wxcafe/patch-1

Typo in filesystems_101.rst
changing some text at oreilly's request
Merge pull request #144 from avleen/introduction

changing some text at oreilly's request
adding rewards paragraph