* Decouple app & plugin UIs. Make UI extensible class consumed by plugin.
* Add flags to force loading truffle lib module from different sources (global, plugin)
* Route all error output through UI Class
* Add error checking for solcover.js loading
* Add truffle lib bundle map
* Full project tests fixtures for repeated use of evm_revert,
* ... and the skipped folders option,
* ... and solidity imports with relative paths reaching outside the `contracts/` folder.