- adds `jsgrammar.LINETERMINATORSEQ_RE`
- lexer `tstream.TokenStream` checks for lineterminators in tokens
- adds `tstream.Token`
- refractors `tstream.TokenStream` and `jsparser.Parser` and to use it
- Fixes (at least changes) global variable referencing in `jsinterp2`
- Adds test suite based testcase for `jsinterp`
- Adds per assertion based skip
- Renames `test_jsinterp` (hopefully temporally) to `test_jsinterp_orig`
- Adds function declaration to testcases (code & ast)