added bit of matrix documentation
added more documentation to matrix.py
added pylint ignore to test files
added bit of matrix documentation
Make check_delta work for vector functions
silly cleanup
Log PBC in esp fitting script
Fix some installation and testing issues
Cell objects can be constructed in C++
cleanup in matrix.py
Improved C++ class for uniform grid and its Python wrapper
Improved CIF file reader
Improve UniformGridWindow
Test for fixed UniformGrid code
Fix outdated use of System.extra
Some more tests for horton-esp-cost.py
Correctly read Gaussian fchk files with ghost atoms
Fix test that used fictitious data
More multiplicities for atomdb
Updated periodic table