fec-jinterf: add throws NPE, OutOfMemory and IllegalArgumentException
fec.c: refactoring of fec_encode, fec_decode and fec_free
commit of the new libfec8 and libfec16 in lib/linux-x86
fec.c: fix regression in fec_free
add throws to nativeEncode and nativeDecode in Native8 and Native16
commit lib after fec.c: fix regression in fec_free