app.py: Improved error handling loading config.yaml
Add pacman_package_in_database()
app.py: Rename conf.dest
tests/util.py: Add package copy function
todo.rst: Add repo test support idea
Add package6, change dependencies in package5
Refactor package object system

* Renamed init_list() to packages().
* packages() returns an OrderedDict of Package objects.
* Added PackageBase() as the baseclass for all packages.
* Package() now inherits from PackageBase().
* Added PackageAur(Package) for package data relating to an AUR package.
* Added PackageBinary(PackageBase) for binary package dependencies located on the host.
* Added missing version comparison operators to new_pkgversion_tuple().
* Refactor test_package.py test_build.py.