merge confab into openbabel
Add jsoncpp 0.6.0-rc2 (amalgamation)
Fix errors in jsoncpp amalgamation process
Add CustomWriter for more control over JSON output when writing files
Add jsoncpp to CMakeLists
Add OBPairBool typdef similar to existing OBPairInteger and OBPairFloatingPoint
Add ChemDoodle JSON format
Merge branch 'confab' of https://github.com/cowsandmilk/openbabel into confab
Porting commits from the original Confab:

torlib.txt, rotor.cpp:
* Using Graph Symmetry, remove symmetrical torsions.
* Reduce the torsions by incorporating graph symmetry. Note that torlib.txt trumps this in the case of CX3 where X is a halide
* Force Forcefield setup always. IsSetupNeeded() fails silently in some cases
Bugfixes and improved write options for ChemDoodle JSON format
Add PubChem JSON format
Merge remote-tracking branch 'upstream/master'
Add method to atom to calculate Lewis acid/base vacancies
Add method to molecule to convert zero-order bonds to single or double bounds and adjust adjacent charges accordingly.
Add ZBO, ZCH, HYD extensions to MDL format
Stop AddHydrogens from resetting the ImplicitValencePerceived flag
Fix bug where unnecessary HYD values were written in MDL format
Remove leftover logging statements
Fix indentation