Remove line in travis to find out if build passes
Merge pull request #697 from gasull/wip-rm-line-travis

Remove line in travis to find out if build passes
Merge pull request #665 from Renelvon/sane_imports

Install package structure. Fix imports (part 1). Enable pylint flag F0401.
Disallow wildcard imports (W0401).

* Also flag unused names from wildcard imports (W0614).
Refactor wildcard imports.

* Drop wildcard; state imported names explicitly.
* Import each module only once.
* Drop unused imports.
* Fix broken imports: Explicitly import modules
  previously implicitly imported by wildcard.
Upgrade to pybitcointools 1.1.15.