Blockchain
* Check if all block could be fetched added
* Thread and Worker class for block fetching added

Account
* lazy and full are correctly passed
* _parse_json_data() added to parse json
Block
* lazy and full are correctly passed
* empty operations are handled
* op_statistics improved
Blockchain
* virtual ops and ops statistics are seperatly calculated
Comment
* _parse_json_data() added to parse dates and amounts
* author_reputation is parsed to int
* lazy and full are correctly passed
Vote
* lazy and full are correctly passed
* _parse_json_data added to parse date and rshares and reputation
* vote.time is a datetime object
* json() returns the original string
Witness
* lazy and full are correctly passed
GrapheneRPC
* time_limit removed, as it supresses KeyboardInterrupt
* ws.settimeout() is set for websocket
* WebSocketTimeoutException  handling added
Unit tests
* test_account fixed
* test_time_limit removed from test_steemnoderpc
* checks added to test_blockchain_batch

Memo
* make prefix changeble
Transationbuilder
* sign() return the signed struct now
Graphenerpc
* Session are used for requests
* Singleton for websocket instance added
* Both measures reduce ram consumption when more than one Steem object is created.
Add missing scrypt package to dependency

Parallel processing improved

Block
* Block contains only the json data + id for block num
* Output for appbase and non-appbase is the same
Blockchain
* batch-rpc-calls added
Graphenerpc
* multithread for websocket activated
* batch with queue  added
Benchmark improved
Unit tests adapted

rpcutils.py added
Timestamp fixed for py27
New unit tests for test_rpcutils

Account:
* add appbase calls
* Parse all amounts
Asset
* Made appbase ready
* supports different asses, diffined in chains.py
Block
* add appbase calls
blockchain
* improve get_estimated_block_num
* add threaded blocks method
Comments
* add appbase calls
Discussions
* add appbase calls
Market
* add appbase calls
Steem
* current_median_history_price -> get_current_median_history
* get_reward_fund -> get_reward_funds
* get_next_scheduled_hardfork -> get_hardfork_properties
* get_hardfork_version removed
* get_reserve_ratio added
* get_witness_schedule added
Transactionbuilder
* appbase calls added
Vote
* appbase calls added
Wallet
* appbase calls added
Witness
*appbase calls added
* WitnessesByIds removed
* LookupWitnesses -> ListWitnesses
steemnoderpc
* Uses now GrapheneRPC
* appbase property added
* get_use_appbase added
* network_version added in check
Chains
* chain for appbase added
* assets restructured
* min_version added
Graphenapi removed
Graphenesrpc removed
graphenerpc added
* supports websocket and http, authomatic switching depending on the https or wss.
* Checks the blockchain_version, if 0.19.4 -> appbase ready
* Add appbase logig
* Handing for request and websocket added
Examples
* benchmark_beem is ready for appbase
* print_appbase_calls added
* print_comments added
* watching the watchers added
Unit tests fixed

flake8 test added to travis
appveyor fixed
formatTimedelta used
flake8 fix
websocket improved