Update README.md
add Squants to Science and Data Analysis section
Add Scala Async

Adds link to Scala Async (https://github.com/scala/async), an
asynchronous programming facility for Scala.
Update README.md

Fix 'Web Frameworks' link
Remove outdated libraries.
Remove deprecated libraries.
Update the description of this list.
Update Contribution rules.
Merge pull request #42 from williambuckley/master

Fix Web Frameworks link.
Add ReactiveMongo.
Remove jerkson.
Merge pull request #27 from phaller/master

Add Scala Async.
Merge pull request #21 from josephpconley/master

Add Squants to Science and Data Analysis section.
Merge branch 'master' of git://github.com/websudosuk/awesome-scala into websudosuk-master

Conflicts:
	README.md
Merge branch 'websudosuk-master'

Conflicts:
	README.md
Merged.
Added new section to index.