Added links, reformatted nosql

I added several links to various areas, and reformatted the nosql
section to show the types of noSQL engines.
Added Gogs git server.
Suggest DREBS to the backup section

http://dojo4.com/blog/aws-ebs-backups-we-rewrote-drebs for more info.
Added Postgres-XL

http://www.postgres-xl.org/
Updated README.md: Added OpenTSDB
Update README.md: Added Heka

# closes #72
added emacs to editor suggestions
Add a link to Clusto, a CMDB
Add MCollective to Cloud Orchestration category
Adding ZPanel
Added MogileFS

Added MogileFS to network distributed filesystems
updated mogilefs link

Changed from mogilefs.com to mogilefs.org
Added Designate to DNS section
Merge pull request #73 from icholy/master

Added Gogs git server.
Merge pull request #74 from milesmatthias/master

Suggest DREBS to the backup section
Merge pull request #75 from mageru/master

Added Postgres-XL
Add Flume and Heka to logging
Merge pull request #77 from johann8384/patch-1

Updated README.md: Added OpenTSDB
Added Designate to DNS section
Sentry added