Simplify chain_database_impl::clear_pending as identified by HackFisher in #71
Update fc submodule
Adding support for renaming accounts
merged with bts_xt_gui branch
More updates tests tracking changes in RPC
Change metadata about parameters to RPC calls encode named parameters, as well as optional and mandatory positional parameters.
More fixes to unit tests.

Conflicts:
	libraries/rpc/rpc_server.cpp
Enhancing block validation

Updating delegate info tracking.
Enabling names to be retracted
Merge branch 'master' of github.com:BitShares/bitshares_toolkit
fix compile issues
Merge branch 'master' of github.com:BitShares/bitshares_toolkit
fixed conflict in rpc_server.cpp
Add RPC methods for setting/getting/listing delegate's "trust level" by name. These are stored in a map in the wallet.
Merge branch 'master' of https://github.com/BitShares/bitshares_toolkit
Fix last commit to account for new method for specifying if parameters are required or optional.
Merge pull request #74 from valzav/master

bts_xt_gui attempt #2
Update Manual Testing DOCs
Merge branch 'master' of github.com:BitShares/bitshares_toolkit
fix os x build and coding conventions
Implement missed block tracking (#75)
Merge branch 'master' of github.com:BitShares/bitshares_toolkit