Fixed wing follower: Get it compiling again
Fixed Wing Follower: Correctly indicate when a waypoint is reached
Fixed Wind Follower: Remove the look ahead.  This was leading to unexpected behavior.
If we want smooth turns then use an arc to connect them.  However, it also provided
behavior so this should be done expressely if desired.
Fixed Wing Follower: Remove unused settings
Paths.c: For curves we were not correctly calculating the error magnitude
Board: Enable the appropriate modules and make them optional when appropriate

Conflicts:
	flight/targets/FlyingF3/Makefile
PIOS_WDG: Define the watchdog flags in pios_wdg.h
Autotune: Use uint32_t instead of uint
Makefiles fix: Need to include source and extraincdirs for OPTMODULES like MODULES
Pathplanner: This was suspended when no follower was running but that was sensitive
to race conditions.  Now just check once a second until a follower is available.
Makefile: fixes for including fixedwingfollower and adding lots of
modules as OPTMODULES
Fix comment
Merge branch 'next' into fixedwingfollower

Conflicts:
	flight/targets/FlyingF3/Makefile
More comment changes
Merge pull request #150 from peabody124/fixedwingfollower

Merged Fixedwingfollower with the understanding that #158 may overwrite most of this.