WIP commit.

Parallel processing works via shared memory. MPI version still has some
deadlock issues.
Working MPI worker pool including periodic synchronization
Major refactoring.
Split trace writing into independent and collective operations.
Parallel data writing works
Small refactoring.
renamed to seperate ObsPy module
Refactoring to proper python module structure
Added small test data set
Working package structure and first input/output test.
Equality checks for SDFDataSet objects.
Added test for equality operations
Deleting obsolte function
Copy Station data before processing
introduced namespace helper
Actually meaningful test.
Nice interface to add quakeml files
Added tests that tests adding events in various fashions.
Added test for version number and name
Added test for dot accessors