Added localChannelId field to donkey's Channel class.

Changed JdbcDao.getLocalChannelId() so that it first attempts to look up the localChannelId for a given channelId from Donkey's list of deployed channels. If not found, then it queries the d_channels table. This is done so that the d_channels table is not queried each time a message is processed.
Issue: MIRTH-2861
Fixed "Saving alerts" still flashing in the status bar if no save is actually performed.
Issue: MIRTH-2863
Removed calls to Donkey.getInstance() and ChannelController.getInstance() in JdbcDao. A reference to Donkey is now passed in to the constructor and the ChannelController is no longer needed since the current and total stats are now passed in as well.

This was done to avoid executing the synchronized blocks inside of the getInstance() methods each time a JdbcDao object is created.
Issue: MIRTH-2862
MIRTH-2864: Fixed ConcurrentModificationException occurring from the dashboardstatus plugin when a connector state is inserted while the state map itself is being serialized.
Set the stripNamespaces property to false on the deprecated getHL7Serializer methods.
Issue: MIRTH-2636
Removed default namespaces from serializer reference list items.

Added to the getHL7Serializer deprecated message to indicate that the new method will strip namespaces by default.
Issue: MIRTH-2866
Removed unnecessary InterruptedException from undeployChannels
Issue: MIRTH-2693
Changed the logger level from ERROR to WARN when serializing a map that contains non-serializable values. 
Issue: MIRTH-2867
Organized imports
Appended license headers.
Added splashscreen.png and mirth_128_ico.png from version 2.2 and put them in the new images folder in public_html.  The splash screen still says copyright 2012.
Issue: MIRTH-2868
Updated splash screen to copyright 2013.
Issue: MIRTH-2868
Improved performance of updating the statistics tables by skipping the update if the stats count changes are all zero. Also the prepared statements are prepared only if they are needed.
Issue: MIRTH-2869