Separate timer code from PWM/PPM code. The method of looking up a callback is now generic which means other (forthcoming) code can configure callback handlers.
Killed some leftovers of GPIO_Pin* stuff I forgot about.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@387 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61
marking some static timer lists const.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@388 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61
reload GPS pids on each eeprom read

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@389 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61
Software serial implementation. Compile with SOFTSERIAL_19200_LOOPBACK to test. Without the define the implementation will have no effect. Next step is to add a 'feature' to enable softserial and settings for the baud rate. Note, only READ is currently supported, write will come later. The highlevel api calls are used in main.c. Uart implementation needs cleanup to make serial port code generic, see uart files for details.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@390 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61
Whitespace/compiler warnings cleanups by Dominic Clifton;
Slight tweak of new althold defaults
NOT-flight-tested .hex committing so people can commence with althold testing.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@391 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61