MAVProxy: initial support for logging commands
moved log command handling to a module

try to start a trend
raise version
don't load log module in setup mode
log: prevent flood of log data requests
tools: allow viewing multiple flight logs
optparse_gui: fixed test app
mavflightview: support GPS2 and multiple flight views
map: added showgps2pos
log: fixed name and description
added DGPS module
log: speed up log download
receive and process MAVLink packets in larger chunks
even larger reads for faster log download
log: added "log download latest"
log: added log cancel
map: enable display of EKF vehicle icon
raise version
mavproxy: now can set and unset specific throttle arm checks
mavflightview: allow 2 sources of position info