Open source sensor libs

Ok.. finally ı fixed all of compile errors and now lib is buildable from source
and also ı added libakm stuff for ak8975(magnet/orientation sensor)

akm part will handle both magnetic/orientatiton
ymahaBma222 will handle accelerometer
gp2a will handle proximity

ı didnt add light sensor because afaik ancora doesnt have right? or if ım wrong?

thats it

but unfortunatly due to lack of free time ı couldnt test it so hold on....f