Documentation.
Fixed broken build instructions link
updated gitignore
neth: jsonrpc and calculate minimum gas
Merge pull request #181 from caktux/develop

neth: jsonrpc and calculate minimum gas
Updates to VM tests.
Merge branch 'develop' of github.com:ethereum/cpp-ethereum into develop
Merge pull request #180 from kaustavha/develop

Fixed broken build instructions link
new rpc methods: procedures, lastBlock, block
Merge branch 'develop' of github.com:ethereum/cpp-ethereum into new-rpc