Update context_ui test to work with newer simpletest module. Simplified test a bit as the testing of setting a context needs to be reworked.

Adding clone & override functionality to context_ui, for drupal 6 this time. Also made code E_ALL compliant and fixed other minor style issues.

#282197 Initial work on the Drupal 6.x port of context. This commit brings only basic functionality. The menu system integration isn't done, nor is the integration for contrib modules. Much thanks to Pasqualle for the patch.

Adding a very early alpha release of context_ui. Provides a user interface for context-based site building.