java_gen: make factories version aware
java_gen: add convenience ActionUtils
Merge branch 'master' of github.com:floodlight/loxigen
Merge branch 'master' of github.com:floodlight/loxigen

Conflicts:
	java_gen/templates/of_factory_interface.java
use Guava's Ints.compare instead of Java7's Integers

Java6 compatibilities
address comments -- remove duplicate getOFVersion method

keeping the getVersion() variant because it is used across all OFObjects
java_gen: make table_id ZERO the default for most flow_mods
Merge into master from pull request #83:
java_gen: minor fixes (https://github.com/floodlight/loxigen/pull/83)