Removed LinkInterface methods which were never being called. Updated various LinkInterface implementation classes to remove the methods. Some methods such as the ones which measure data rates or bits sent/received were implemented in only some of the implementation classes, and in some cases implemented incorrectly. If they were called, the values returned would be incorrect. Although there was some partial implementation for these I removed them as well since in all case they were never being called by any code. In checking Blame, these came across in 2010 and have remained unimplemented since them, so I figure better to clean up than leave crufty, unused, half finished stuff in.

re-enable linux text to speech and fix use of deprecated function

Fix setmode (in-air disarm fix)

Use onboard remaining battery estimate by default

Tcp support

Do not filter/hide line in linechartwidget when checkbox of the line is ...

differential pressure/airspeed calibration ui

override is not aviable in gcc 4.6 (only in 4.7).  Removed for compatability

Removed for compatability

LinechartWidget: fix removal of curves

A hefty commit to try to clean up MainWindow

flightgear hil: correct scaling of pressure for mavlink message and remo...

Filtering in plot perspective

Calibration fixes