• Added ability for users to add their own forcefield files.  This should be particularly useful for HETATMs.
• Added sdens keyword to inputgen.py to make PDB2PQR compatibile with APBS 0.4.0. 
• Added a new examples directory with a basic runthrough on how to use the various features in PDB2PQR.

Bug fixes

• Fixed a bug that was unable to handle N-Terminal PRO residues with hydrogens already present. 
• Fixed two instances in the PropKa routines where warnings were improperly handled due to a misspelling.
• Fixed instance where chain IDs were unable to be assigned to proteins with more than 26 chains.