Serialization/load of parser tables and parse trees/ASTs

[igordejanovic]

• Should be a fast binary format. Usage of e.g. Apache Thrift
• Interoperability between tools

Use cases:

• Tables could be constructed faster using e.g. go-parglare (still in inception) and used in Python. Faster development time for very large grammars.
• Parse trees/ASTs could be transformed and semantic actions can be performed using different tools written using different languages.

[igordejanovic]

Partly solved on the master branch by persisting parser LR table. See #52