Initial commit of Particles classes.
Fixed bug -- no super call from Particle and Bond classes
Modified deep copy of low level objects.
Modified name of 'ABCParticlesContainer' and 'ParticlesContainer' to 'ABCParticleContainer and 'ParticleContainer' due to another developer request
Changed 'x', 'y', 'z' attributes of Particle for a 'coordinates' attribute.
Fixed equal operator for particles and bonds, and removed the others since we dont need them for now. Added a property in the base class 'ElementsCommon' for the id making it read-only for the moment.
Added more info in exceptions and errors.
Merge branch 'master' of https://github.com/simphony/simphony-common into feature-particles
Fixed test_particlesclasses.py file for travis-ci support.
adding pytables to travis configuration
Initial commit illustrating io with pytables
Fix path in unit tests
pep8 fixes
fixing imports
adding valid method
making open a classmethod
adding documentation
moving files into io
deleted files
adding bonds to abc/file particle container