Fixes things like:
* exported type/method/function X should have comment or be unexported
* comment on exported type/method/function X should be of the form "X ..."
(with optional leading article)
Refs. #213.
* implemented operation and param flags in the cli invoke cmd.
* reverted prev changes and added debug flag for compiling.
* change transactionType variable to Type, for package convention
* index support for arrays.
* implemented builtin (len) for the compiler.
* bumped version -> 0.35.0
* updated compiler README and changed invoke to testinvoke.
* Started RPC package to allow querying balances and sending raw transactions for sc's
* integrate invoke cmd in cli
* bumped version
* added sendrawtransaction to the rpc client.
