Beem

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* Fix issue 97 `get_discussions()` does not finish if discussions are empty by espoem
* Fix issue 99 DivisionByZero Error in Account.get_rc_manabar() by crokkon
* Add claimaccount to beempy and some improvements for steem.sbd_symbol
* newaccount adapted for HF20 and can be used to create claimed account
* Correct operationids for WLS
* Improve steem.refresh_data() reading
* Set network prefix in Signed_Transaction and Operation for using the correct operationids
* Fix test_block unit test

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* fix issue 93 - Wrong input parameters for `Discussions_by_author_before_date` in Docstring and `get_discussions` by espoem
* Add support for whaleshares (WLS) and Financial Transparency Gateway (EFTG)
* Using generic asset symbols by crokkon
* Bug fixes for python 2.7
* Fix for witness update

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* fix get_effective_vesting_shares()

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* get_effective_vesting_shares() added to calculated max_mana correctly
* dict key words adapted to steemd for get_manabar() and get_rc_manabar()
* Voting mana fixed for 0 SP accounts
* comment_benefactor_reward adapted for snapshot
* Custom_json RC costs added to print_info

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* add RC class to calculate RC costs of operations
* add comment, vote, transfer RC costs in account.print_info() and beempy power
* Shows number of possible comments, votes, tranfers with available RCs in account.print_info() and beempy power
* get_rc_cost was added to steem to calculation RC costs from resource count
* bug regarding new amount format in witness update fixed (also for beempy witnessenable and witnessdisable)

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* estimated_mana is now capped by estimated_max
* print_info fixed()
* get_api_methods() and get_apis() added to Steem