added numpy imports to some benchmark tests
started work on restructuring benchmarks (split matlab and python scripts) so that two arbitrary benchmarks runs can be compared (I want to compare qutip 2.2.0 and qutip 2.3.0-dev in addition to qutip and qotoolbox comparisons)
fixed json benchmark file parsing in comparison script
write json data to file given by cmd line argument (or default value)
updated benchmark comparison script to so that it takes filenames as command line arguments
updated benchmark scripts
restructured d3 code to be less hardcoded and able to display more kinds of benchmark data
added more examples to benchmark README file
formatting fixes
another attempt to fix markdown formatting
Merge pull request #14 from qutip/benchmark-restructuring

Benchmark restructuring