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.
Adding serialization section.
Added Twitter Util.
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Remove outdated libraries.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
Included Semantic Web category
Merged.
Added new section to index.