don't strip atom types. this breaks unit tests
added a script to transform incorrect ptools pdbs into correct ones
raise an error if non-recognized pdb format
allows wildcard matching atom types more than one char long
added new property to atoms: pdbatomtype
unit tests now pass
Merge branch 'feature/fixpdb' into develop
Merge branch 'develop' of bitbucket.org:asaladin/ptools into develop
Merge remote-tracking branch 'github/develop' into develop