Add DecoHelper
Add helper for statistics. Record measurement error (of measured distance).
Fix bug when sending fails
Implement a simple filter for estimating distance
Implement Lateration tracking algorithm
BaseWirelessPhy: do not switch to TX mode automatically when receive notification from upper layer; switch to TX mode automatically when receive packet from upper layer (if neccessary). CCA is only valid if in RX mode.
Implement interframe spacing IFS
Add application for BS
Use simple filter for path filter
Test multiple targets
Test tracking with single target
Add module for physical layer simulating CC2420 transceiver
Fix a f*cking stupid annoying bug when get parameter
Record residual energy in each node
Record total residual energy
Count received/lost MAC packets