Matlab functions (1st pull)

Main m-function "car2go" creates GUI-window
and calls 
1) external m-function "ioCarCfgF" to read cfg-file  "car2goV01.cfg"
2) internal function "readCarData" to read car2go data file (this was the simplest part about 15-30 mins to write and test)

Notes: 
1) Most time spent for GUI and data structure design
2) Next phase: data file processing and visualization

Hope to finish 1st iteration through the next week.
The goal: main functions interact in some meaningful way.