Toolchain: Add more compiler options, add note about -Wfloat-conversion warning (available with GCC 4.9). Needs work.
Toolchain: Add more compiler options, add note about -Wfloat-conversion warning (available with GCC 4.9). Needs work.

jlecoeur/Firmware,mcgill-robotics/Firmware,PX4/Firmware,PX4/Firmware,jlecoeur/Firmware,jlecoeur/Firmware,darknight-007/Firmware,mcgill-robotics/Firmware,mcgill-robotics/Firmware,PX4/Firmware,krbeverx/Firmware,Aerotenna/Firmware,mje-nz/PX4-Firmware,mcgill-robotics/Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,dagar/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,krbeverx/Firmware,Aerotenna/Firmware,mcgill-robotics/Firmware,acfloria/Firmware,dagar/Firmware,PX4/Firmware,jlecoeur/Firmware,dagar/Firmware,krbeverx/Firmware,mcgill-robotics/Firmware,PX4/Firmware,Aerotenna/Firmware,darknight-007/Firmware,dagar/Firmware,Aerotenna/Firmware,Aerotenna/Firmware,acfloria/Firmware,dagar/Firmware,krbeverx/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,mje-nz/PX4-Firmware,mje-nz/PX4-Firmware,dagar/Firmware,krbeverx/Firmware,PX4/Firmware,acfloria/Firmware,dagar/Firmware,mje-nz/PX4-Firmware,acfloria/Firmware,mje-nz/PX4-Firmware,jlecoeur/Firmware,krbeverx/Firmware,PX4/Firmware,darknight-007/Firmware,Aerotenna/Firmware,jlecoeur/Firmware,acfloria/Firmware,darknight-007/Firmware,darknight-007/Firmware,krbeverx/Firmware,Aerotenna/Firmware,acfloria/Firmware