Lots of optimizations to Lepton, including creating CompiledExpression class.
Converted lots of ExpressionPrograms to CompiledExpressions
Merge pull request #173 from peastman/master

Performance improvements to CPU implementation of custom forces
Updated documentation for Lepton
Merge pull request #174 from peastman/master

Updated documentation for Lepton
Fixed segfaults on some computers
Merge branch 'master' of https://github.com/SimTk/openmm
Merge pull request #175 from peastman/master

Fixed segfaults on some computers
Added AmoebaMultipoleForce::getInducedDipoles()
Merge pull request #176 from peastman/master

Added AmoebaMultipoleForce::getInducedDipoles()