Exclude logback-classic in pom from neo4j.

Was causing a weird conflict with some other dependency.
Fixed null deserialization problem with lists in MsgPack.
Merge remote-tracking branch 'bdeggleston/master'

Conflicts:
	rexster-server/src/integration/java/com/tinkerpop/rexster/AbstractRexProIntegrationTest.java

Added fix for checking if a graph is actually transactional using graph features.
RexPro tests no check features of a graph when necessary for testing against multiple graphs.
fixing edge in/out vertex id serialization to stringily non primitive id types