In agents/, environments/, search/, and aixi.py: fixed imports so that they work even when the package is not installed, as well as when the package is not named 'pyaixi' (e.g. as when this code is extracted from an archive, and the package path is pyaixi-1.0.0, which is an invalid Python package name.)
In doc/changelog.txt: added a note about the 1.0.1 release, which fixes package imports.
In setup.py: bumped the version number for the 1.0.1 release.