add new logging mechanism
add logger for SD card
Merge pull request #101 from matthesrieke/master

add new logging mechanism
make logging more robust.

catch runtimeexceptions when logging messages.
add ACRA lib for crash reports.
introduce Util class.
add ACRA crash report handler
Add new Activity for Issue Reporting
remove leading dot from storage folder
fix Zip archive issues on older devices.
Merge pull request #102 from matthesrieke/master

Add new Feature for Issue Reporting
adjust reporting email
- organize imports
- remove InvalidLocationExceptiin measurement
- refactor some log statements
optimize logging
- add exception handling to mass air flow command. Occures when obd
adapter delivers wrong values for this command

- a switched off car results in nullpointer when checking the response
data

- add some logging statements

- add line numbers in logging

- close issue report fragment after when sending report
- add position info to dashboard

- add positioning by network

- add dashboard always active preference setting
- add some convenience methods to the track to calculate consumption...

- change logging to create a maximum of 3 logging files a 5 MB
delete remote track now possible