fix issue causing waypoint and parameter files to be saved as '.txt' when the user selects the default filename.
Remove consideration of mission command items from within the flight path generation.
Merge pull request #1297 from ne0fhyk/fix_issue_1296

Fixed saved filename issue.
Allow use of signed numbers on the cardwheelhorizontalview widget.
Update the color of the altitude when it's negative.
Merge pull request #1298 from ne0fhyk/fix_issue_1294

Fixed issue with mission flight path generation.
Merge pull request #1299 from ne0fhyk/fix_issue_1243

CardWheelHorizontalView widget signed numbers support.
enabled parameters update when it's loaded from a saved file.
Merge pull request #1301 from ne0fhyk/fix_issue_1295

Fix issue 1295.
Set opened filename as default filename.
Merge branch 'master' of https://github.com/DroidPlanner/droidplanner into set_opened_filename_as_default_filename

Conflicts:
	Android/src/org/droidplanner/android/fragments/ParamsFragment.java
Merge pull request #1302 from ne0fhyk/set_opened_filename_as_default_filename

Set opened filename as default filename.
fixed editing issues with the parameters on lollipop.
Merge pull request #1304 from ne0fhyk/fix_params_issue_on_lollipop

fixed editing issues with the parameters on lollipop.