introduce Autoload class to abstract configuration specialities from explicit bundler

Conflicts:
	src/Clue/PharComposer/Package.php
refactor: classmap contains only list of files, never directories
unify style in methods

Conflicts:
	src/Clue/PharComposer/Bundler/Explicit.php
get rid of mock object to prepare adding of excludes
Merge pull request #26 from mikey179/master

simplify explicit bundler