Added support for find_rc_accounts, get_resource_params, get_resource_pool in...

Added support for find_rc_accounts, get_resource_params, get_resource_pool in addition with helper methods for calculating and getting the Manabars (RC & VP) (#27)

* rewritten

* refactored mana calculation and changes due to review

* temp push to test tests

* added tests and fixed linting

* reverted ToString for Asset serialization

* added withdrawing vests to getVests calculation

* lint

* fixed methods returning the meta object instead of the object