Create full test suite for smiles parser

[gilmanb]

We need more smiles strings to test against our parser

[tjod]

There are 500 smiles in qsmiles/smiles_test_mols.js
I got 1,000,000 more..too many to push to jchemhub?

[gilmanb]

I think 1M is way too many. Would be best to split them up into classes of compounds that we can/cannot parse