Fixed creation of local export files

Jira-Issue: APPTRAVEL-3
Removed unnecessary alert

Jira-Issue: APPTRAVEL-3
Fixed access to remote file systems.

Jira-Issue: APPTRAVEL-3
Changed folder for storing files to /travel

Jira-Issue: APPTRAVEL-3
Fixed FileReader for importing remote travel updates

Jira-Issue: APPTRAVEL-3
Merge pull request #3 from easy-s/APPTRAVEL-3

Fixes sync of travel plans between devices