Remaining features for input file

[connie]

Follows up on: https://github.com/ReactionMechanismGenerator/RMG-website/pull/88

• Depositories: being able to specify training reactions to be on vs. off, or turning on all of them (including NIST I presume?)
• Families: setting default, all, or other custom families
• Capability to set initial mole fractions for each individual reactor
• Solvation/Liquid Reactors
• filterReactions True or False

Some non-features:

• kineticEstimator only has 1 option
• options: units: there are no units other than si