Support more that 32 bit packets to be received.

An array of 32 bit values can be received by setting the macro RCSWITCH_UINT32_ARRAY_SIZE as a compile option: E.g. compile option -DRCSWITCH_UINT32_ARRAY_SIZE=3 allows up to 3 32 bit values to be received. If the 32 bit values are whitenend (refer to whitening algorithm in RcSwitchTransmitter) they can be de-whitened by using the computeWhitening() functions from that library. Refer to Freescsale Semiconductor AN5070 Rev. 0, 07/2015, page 7 for the whitening algorithm.