Merge pull request #64 from libbitcoin/develop

Merge develop, fix secp256k1 break, complete tests.
Merge pull request #66 from libbitcoin/develop

Move Travis libbitcoin reference back to libbitcoin repo.
Update readme help documenation.
Rename config in codegen.
Refine help and dispatch.
Fix gcc warnings.
Avoid multiline comment.
Parallel make.
remove parallel make until we get rid of recursive make.
Merge pull request #68 from evoskuil/develop

Refine help and dispatch.
Fix gcc warnings (for real).
Merge pull request #69 from evoskuil/develop

Fix gcc warnings (for real).
change network timeout from zero to 2 sec, add network tests
Group tests.
Define common network test parameters.
Move wait and retry options to settings.
Run only unit and functional tests from build script (no network).
Fix fetch-tx-index and add native format tests.
Add support in fetch-tx-index for various formats.
fix command line processing error.