balance plugin initial

Change-Id: Id81d1deed71558f6652b8c9b3a7689ccccbc5031
Add basic balance plugin logic
Add balance plugin panel

TODO:
-fix clipping
-add updating after call and every 5mins
-fix panel not initializing properly (delay launch?)
Fix clipping under accountLabel when window is extremly small.
Add basic logging
change label dimension and remove unucompiled bundle from autostart
Add currency to balance
Fix NPE when no connection.

Prevent plugin crashing when no connection.
Start balance plugin after all other bundles
Update balance plugin
Add call history service support to bundle
Balance Plugin: Add balance checking every 5 minutes
Add balance updating after every call.
Properly stop call listener.
Auto update button size
Add proper currency symbols.
Remove unused imports. Add support for balance plugin disabling.

Plugin checks "net.java.sip.communicator.plugin.balance.DISABLED"
property. set to "true" to disable it.
Move balance plugin to proper start level.
Remove unused imports. And add configuration service import.
Bump version.

2.5.31