print period and freq of modules' periodic functions

in generated/modules, define freq/period with
the name of the function all in capital letters
followed by _FREQ or _PERIOD
use new generated x_PERIODIC_FREQ in bat_checker module
Merge branch 'master' into dev

* print period and freq of modules' periodic functions
* updated bat_checker module to use that
Added preliminary support for luftboot.

By default all lisa/m 2.0 firmware will end up at address 0x8002000 and
jtag will put it there without erasing the bootloader. If you intend to
not use Luftboot you have to set
<configure name="NO_LUFTBOOT" value="1"/>
in your airframe file.

Using DFU for flashing firmware still needs to be added.
Added the dfu flashing script. Lisa/m 2.0 board is now by default using the DFU flashing mode.

As paparazzi (payload) does not contain a way to switch to the
bootloader yet you need to connect ADC2 pin to ground on power up to
force the bootloader mode.
call mag handler in imu aspirin2 driver, otherwise will never be scaled
Merge branch 'dev' into dev_i2c
Lisa/L does not use luftboot. Make it so! :)
Merge branch 'dev' into dev_i2c
made /opt/paparazzi take precedence over /opt/local in makefiles to address some path issues, OS X specific
Merge pull request #179 from scdwyer/dev

fixes Issue #175
[airframe files] removed MAG_[XY|XZ|YZ]_SENS defines, they are never used anywhere
removed old/obsolete booz2 subsystem makefiles
[rotorcraft] force kill mode if ahrs is not aligned, even if RC is not used.
only read rc to check motors and in_flight if not in FAILSAFE or KILL mode
[bat_checker module] only compile for target ap
[gps_nmea] attempt to fix nmea parser at least a little bit
* fix gps.course
* fix gps.lla_pos
* fix altitude: it is in mm
* compute gps.ecef_pos for rotorcrafts
* added subsystem for rotorcrafts
[gps_nmea] if fix is reported as 1, it is really no fix, was correct before
[gps] set gps.utm_pos.alt correctly
it was zero because utm_f.alt was never written anywhere
[math] in function utm_of_lla_f: copy altitude from lla
[gps_nmea] read hdop and use it as pdop, better than nothing