Removed call to gw.setPALevel(RF24_PA_LOW) because the gateway PA Level is set by RF24_PA_LEVEL_GW in Config.h that is used by the gw.begin() method to set the PA_Level for the gateway.  Users should change the PA_Level for the gateway using RF24_PA_LEVEL_GW in Config.h
Merge pull request #3 from bblacey/config-fix

Removed call to gw.setPALevel(RF24_PA_LOW) because the gateway PA Level ...