Upgrade for aiida-core==1.0.0b5

Change log:

• Reformatted crystal17.main and crystal17.basic to use run program directly from crystal executable (rather than the runcry script)
  • added restart functionality to CryMainCalculation (via a fort.9 in a remote folder)
  • added checks and error codes for PbsPro messages to _scheduler_stderr.txt (e.g. walltime limit reached)
  • allow SHRINK IS input to be a list ([IS1, IS2, IS3])
  • added output of TrajectoryData of optimisation steps for CryMainCalculation
• Wrote internal stdout parser for crystal17.main
  • This builds and improves on the original ejplugins implementation: making the parsing flow more easy to understand, adding additional data parsing (some taken from tilde), and restructuring the output json
• added CryMainBaseWorkChain (a replica of PwBaseWorkChain from aiida-quanumespresso)
• Added crystal17.doss and crystal.fermi calculations, and CryPropertiesWorkChain
  • also added add band gap calcfunction
• Improved crystal17.sym3d
• Standardised GULP potentials and rewrote PotentialData
  • all potentials now share the a common jsonschema
  • the full potential file is created and stored in the repository
  • refactored reaxff read/write
  • added fitting data input
• Added GulpFittingCalculation
• Added some helpful methods for manipulating StructureData
• Rewrote immigration functions (to use aiida-core v1 mechanics)
• Restructure tests into central location and added many more
• Updates Documentation and removed graph.py (now in aiida-core)