I'm getting these compile errors from the latest git version, as far as I know all the libraries are there so not sure why these errors would appear. Anyone with greater experience help me out?

In file included from ArduCopter.cpp:93:
GCS.h:129: error: 'ParamToken' in class 'AP_Param' does not name a type
ArduCopter.cpp: In function 'void update_trig()':
ArduCopter:1850: error: 'safe_sqrt' was not declared in this scope
ArduCopter.cpp: In member function 'void GCS_MAVLINK::handleMessage(mavlink_message_t*)':
GCS_Mavlink:1165: error: '_queued_parameter_token' was not declared in this scope
ArduCopter.cpp: In member function 'uint16_t GCS_MAVLINK::_count_parameters()':
GCS_Mavlink:1648: error: 'ParamToken' is not a member of 'AP_Param'
GCS_Mavlink:1648: error: expected `;' before 'token'
GCS_Mavlink:1650: error: 'token' was not declared in this scope
ArduCopter.cpp: In member function 'void GCS_MAVLINK::queued_param_send()':
GCS_Mavlink:1678: error: no matching function for call to 'AP_Param::copy_name(char [15], unsigned int, int)'
G:\My Documents\Arduino\libraries\FastSerial/../AP_Common/AP_Param.h:95: note: candidates are: void AP_Param::copy_name(char*, size_t)
GCS_Mavlink:1687: error: '_queued_parameter_token' was not declared in this scope
ArduCopter.cpp: In function 'void Log_Write_Performance()':
Log:650: error: 'class AP_DCM' has no member named 'renorm_range_count'
ArduCopter.cpp: In function 'void calc_loiter(int, int)':
navigation:150: error: 'class AC_PID' has no member named 'set_integrator'
navigation:151: error: 'class AC_PID' has no member named 'set_integrator'
ArduCopter.cpp: In function 'void calc_nav_rate(int)':
navigation:220: error: 'class AC_PID' has no member named 'set_integrator'
navigation:221: error: 'class AC_PID' has no member named 'set_integrator'