Remove unused config string.
Merge pull request #425 from hean01/master

Remove unused config string.
Cleanup of capture view.
* Rename of capture view into tethering view
* Remove the never used concept of capture modes
* Additional cleanups
Merge pull request #426 from hean01/tethering_view

Cleanup of capture view.
Rename capture module to session.
Merge pull request #427 from hean01/master

Rename capture module to session.
Renamed dt_lib_capture_t to dt_lib_session_t.
Merge pull request #428 from hean01/master

Renamed dt_lib_capture_t to dt_lib_session_t.