upgrade pom version to 0.2.0-SNAPSHOT
.abat-automerge: run check-all
java_gen: Declare fragmentation flags in OFConfigFlags as MaskedEnumGroup
prerequisite: declare safe OFValueType utilization
IPAddresses: fix accidental use of byte[].toString()
java-gen/pre-written: remove unused class
HexString: fix (theoretical) FindBugs warning
java_gen: add MaskedEnumGroup fro OFTableConfig.TABLE_MISS

remove unused var
Merge into master from pull request #73:
upgrade pom version to 0.2.0-SNAPSHOT + a few snapshots (https://github.com/floodlight/loxigen/pull/73)