GitLab

1. added catch Error in WifiLinkManager, for old devices.
2. set default autoplay as true.

Merge remote-tracking branch 'origin/merge_with_work_offload_temp' into merge_with_work_offload_temp

Merge remote-tracking branch 'origin/merge_with_work_offload_temp' into merge_with_work_offload_temp

API version changed to 23 (need MediaDataSource).

Added message buffer size and black list size in gossip fragment (still need to split message buffer and black list in gossip module).

Added MessagingNamespace event buffer. Buffer messages when sending to app, helps when the gossip module exchanges a lot of names.
Fixed issues with messaging, modified API from net layer accordingly.
Issue 1: the application would send the name change event back when it is got from the net (this is the logic from last year).
	Solution: check if the names are equal when sending to the net
Issue 2: the net would send the message back since the MessagingNamespace is listening on the channel
	Solution: add initiator in send function so that the application can see if it is from itself.
Need to work on template actions.

Need to work on template actions.

Working on namespace.

Fix Local

Updated toString of Message.

# Conflicts:
#	app/src/main/java/nist/p_70nanb17h188/demo/pscr19/gui/work_offload/WorkOffloadMaster.java
#	app/src/main/java/nist/p_70nanb17h188/demo/pscr19/gui/work_offload/WorkOffloadSlave.java
#	app/src/main/java/nist/p_70nanb17h188/demo/pscr19/logic/net/NetLayer.java