Several Improvements and bug fixes to core functionality

Bug fixes in local ephemerides calculations, in merging overlapping .tim files, and in the fitting routine.

CRIMP v2.2.0

CRIMP v2.2.0: Added functionality, expanded documentation
CRIMP v2.1.2: Important bug fix in local ephemerides, improvements to other modules
CRIMP v2.1.1 : Bug fixes and some improvements to plotting
CRIMP v2.1.0 : Some improvements to logging, the ToA fitting algorithm, and bug fixes to several other routines
CRIMP v2.0.0 : Major new functionality, such as ToA fitting, local ephemerides calculation
CRIMP v1.0.1 : Some bug fixes to brute force minimization and naming conventions
CRIMP v1.0.0 : First public release