- renaming export config dialog
- adding export range configuration (not in use yet)
- abstracted reading updates for samples per second configuration
- implemented configurable export range
- removed empty entry in export format select list
Merge branch 'master' of https://github.com/DrTon/FlightPlot into export_config

Conflicts:
	src/me/drton/flightplot/FlightPlot.java
	src/me/drton/flightplot/export/ExportConfigurationDialog.java
	src/me/drton/flightplot/export/ExportManager.java
	src/me/drton/flightplot/export/ExporterConfiguration.java
	src/me/drton/flightplot/export/PX4TrackReader.java
	src/me/drton/flightplot/export/ReaderConfiguration.java
	src/me/drton/flightplot/export/TrackReader.java
use seconds instead of microseconds to specify export range
added labels to show formatted time range
Merge pull request #7 from AndreasAntener/export_config

Configurable export time range