Fix HUD pitch indicator, by limiting the range draw to +-25 deg from the drone pitch.
Closes #71.
Dialog for entering the guided mode altitude.
Fix autoreturn in throttle stick. Closes #32
Merge pull request #72 from arthurbenemann/issue32

Fix autoreturn in throttle stick. Closes #32
Merge pull request #73 from arthurbenemann/issue20

Dialog for entering the guided mode altitude.
Merge pull request #74 from arthurbenemann/issue71

Fix HUD pitch indicator,
Preparing for release v0.7.1