Adding enum field to int types that are linked with an enum
bug fix - mavutil forgot to write its timestamped log.

mavutil can create the timestamped logfile but forgot
to write anything to it. This fix is to get the log file
written.

Signed-off-by: Quy Tonthat <qtonthat@gmail.com>
Merge pull request #158 from AutoQuad/upstream

Match mavlink_system_t.nav_mode size to allowed size in heartbeat msg (32bits).
added support for DGPS update messages and a 2nd GPS
pymavlink: support DF logs for mavparms.py
pymavlink: fixed text parsing of log file headers
pymavlink: added mavgpslag.py

estimate GPS velocity lag from DF logs
pymavlink: mavtomfile.py generates more MATLAB-friendly m files
pymavlink: fixed timestamps for GPS2 messages
apm: added EKF message

used for testing NavEKF system in SITL
pymavlink: raise version
APM: rename EKF to AHRS2

useful for when EKF is primary and DCM is secondary
pymavlink: handle missing Columns column
pymavlink: raise version
pymavlink: fixed reopen of serial ports
pymavlink: support uppercase bin log files
pymavlinkL raise version
2D KML gps export working
add .project and .pydevproject to .gitignore
kml: gps as linestring works