updated GPS panel and map.jpg for background

updated GPS panel and map.jpg for background, This is
Merge branch 'master' of https://github.com/CMU-Robotics-Club/RoboBuggy
Added encoder library files
updated Nano_encoder with lib_encoder
Updated gpsPanel for merging into main GUI
Content clarification/baby spelling change
added gps panel with map
Merge branch 'master' of https://github.com/CMU-Robotics-Club/RoboBuggy

Conflicts:
	surface_src/java_src/GUI_for_data_logging/src/com/roboclub/robobuggy/ui/GpsPanel.java
Fixed image for gps pane,  removed maptest image, why was it added
remove incorrect calls to Serial.write()
clean up nano encoder code
clean up protocol_prototype sketch
Fixed bug with steering initialization
first pass at an arduino library
working arduino makefile for nano_encoder
Fixed arduino nano code. To test with encoder. Tested with button. Seen
debounce issues
Added gps panel
Updated the encoder code to make the loop faster and fixed some problems
with serial write.
Fix SensorLogger ==/.equals misunderstanding, send thread termination messages
complete merge of master
Merge pull request #54 from CMU-Robotics-Club/arathorn593_nano_encoder

Arathorn593 nano encoder