Implement the pressure interrupt and SYS_MSG
Add pressure init in the main program
Begin to work on altitude module & logic
Altitude - Put everything in the module
Add a config flag to include or note pressure code
Fix ifdef sections for accelerometer module
Fix pressure sensor and module
Remove old flag for pressure sensor init
Enable metric system selection in altitude module
Fix sensor activation/des. with timer
Implement French days of the week
Fix permissions when using "make install"