v0.1.0

This release gets pybm out of the experimental phase!

New features:

• pybm report was deleted in favor of pybm compare; all previously available functionality from that command is now contained in additional switches for pybm compare. #32
• A legacy git checkout-based way for sourcing benchmarks from other refs was implemented, which pushes the minimum required git version down to 2.17.0 again. #33
• A global configuration file was added, which can be used to set different values for pybm config initialization without typing them out for pybm init. #34
• pybm's result saving was changed to a general IO interface, which is a general class interface implementing read and write APIs. #41
• pybm env switch was implemented to change a worktree's checkout from the command line. #41

Fixed problems and bugs:

• Fixed a bug which resulted in installed / uninstalled packages not being reflected in changing TOML env state when using pybm env install/uninstall. #39
• Fixed a bug which parsed out the version incorrectly from git --version output on Windows. This change enabled pybm checkout-based benchmark runs on Windows. #39
• Changed the timeit runner's logic to avoid the repeated Timer.autorange overhead, resulting in substantial performance gains. #39
• Added a small quickstart section to pybm for better getting up and running. #40