Move general purpose phake/functions.php

is_tty() moved to term_colors.php
resolve_runfile() and load_runfile() moved to phake/Builder.php
fatal() moved to phake/Bin.php
Application can (optionally) be injected into Builder
Set global Builder reference for builder()
Improve error reporting when specifiying invalid files
Use explicit references to Application and Builder
Add skeleton for PHPUnit tests and travis
Move test for execution order to test suite
Add travis status icon
Merge pull request #26 from clue/cleanup

Move general purpose phake/functions.php
Merge pull request #27 from clue/builder

Improve Builder
Merge pull request #28 from clue/tests

Add PHPUnit tests and continuos integration via travis