Split benchmark into two parts: load data, read data
Add test to check if throws exception on unsorted data
Don't loop to check if sorted
Remove merge_array code, replace with NumPy date time conversion.
Use NumPy functions to search the arrays (remove all loops)
Version 0.0.10. Update README to reflect new benchmark results.
Merge pull request #2 from afiedler/speed-up-append

Speed up append