added TTL test with partial update
Merge branch 'master' of github.com:Netflix/astyanax
Merge branch 'master' of github.com:Netflix/astyanax
Merge branch 'master' of github.com:Netflix/astyanax

Conflicts:
	astyanax-thrift/src/test/java/com/netflix/astyanax/thrift/ThriftKeyspaceImplTest.java
Merge branch 'master' of github.com:Netflix/astyanax
added TTL annotation support at method level. this can be flexibile/powerful.
only moved comments
Merge pull request #215 from stevenzwu/master

issue 209: added TTL annotation support at method level