new parser
added ferry's first comments and improved the parser code a bit
Fix indentation

Signed-off-by: Ferry Huberts <f.huberts@mindef.nl>
Fix setting the presence field in nmea_time_now

Signed-off-by: Ferry Huberts <f.huberts@mindef.nl>
Update doxygen configuration file

Signed-off-by: Ferry Huberts <f.huberts@mindef.nl>
Merge branch 'new_parser' of https://github.com/TobiasSimon/nmealib

* 'new_parser' of https://github.com/TobiasSimon/nmealib:
  added ferry's first comments and improved the parser code a bit
  new parser
Add parser test program to the samples

Signed-off-by: Ferry Huberts <f.huberts@mindef.nl>
Extensive parser refactoring

Inspired and based on work by Tobias Simon

Signed-off-by: Ferry Huberts <f.huberts@mindef.nl>
Use an internal buffer in the parser, to allow streaming mode

Signed-off-by: Ferry Huberts <f.huberts@mindef.nl>