* run clang-tidy with readability-braces-around-statements
clang-format the results
clean up all the parts that clang-tidy-8 broke
* fix problem on windows
* basic conrec integration
* basic conrec integration
* add molecule contouring
* update
* add an alpha channel to the color
* allow filling the grid
* cleanup
* remove some debugging output
* first pass at getting similarity maps to actually work
* updates
* add another test
explicitly set linewidth to 1
* some SVG cleanup
* add option for extra padding
* update expected test results
* efficiency
* at least something of a test
* forgot an import
* fix SWIG wrappers
* cleanups in response to review
* allow calling the functions without providing levels
* allow contouring numpy grids
