Update StatsReplySerializer.java

Added serializers for Group Stats, Group Desc, Group Features, Meter Stats, Meter Config, Meter Features, Table Stats & Table features
Update AllSwitchStatisticsResource.java

Added support for Group Stats, Group Desc, Group Features, Meter Stats, Meter Config, Meter Features, Table Stats & Table features
Update SwitchResourceBase.java

Added support for Group Stats, Group Desc, Group Features, Meter Stats, Meter Config, Meter Features, Table Stats & Table features
Update SwitchStatisticsResource.java

Added support for Group Stats, Group Desc, Group Features, Meter Stats, Meter Config, Meter Features, Table Stats & Table features
Merge pull request #7 from Naveen165/master

Statistics update - support for OF 1.3 stats