Added timing, profiling and line profiling information for harvester
Added unit tests to compare gravmag prism implementations
Added benchmark for gravmag.prism
Manually unrolling loops in gravmag.prism makes no difference
Removed unrolled loops from gravmag._cprism for better syntax since there was no speed gain
Updated gravmag.prism benchmark to many prisms instead of single prism
Added boundscheck False makes no difference in gravmag.prism
Updated experiment with numexpr in gravmag.prism. Great speedup for large comp points
Added tests and benchmarks for unimplemented cython and numexpr gravmag.prism functions
finished Cython implementations in gravmag.prism
Finished numexpr implementations in gravmag.prism. Tests passing