add decorator to map "/path/to/.." in args/kwargs + tests
just pass if file is not found in obspy
check length of args
use decorator for "/path/to/.." resolving
Merge branch 'master' into decorator_example_file

Conflicts:
	obspy/core/event.py
Merge pull request #660 from megies/decorator_example_file

Use decorator to resolve "/path/to/..."