Added ability to set OS specific path for dataman file
Added ability to set OS specific path for dataman file

dataman can now be started using:

dataman start -f filepath

Signed-off-by: Mark Charlebois <f1891e7fc976ae1bd489627e2954fb730751d728@gmail.com>

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