Moved testing code out of civet.scm into new tests/civet-test.scm.
All v0.9 elements are included, though not completely described.
Reverted README to v0.1.
Added a cautionary note.
New experimental code.
Minor documentation fixes.
Added head element to conform to latest spec.
Added test code for documents with no namespace mapping.
1. Added alist-except proc.
2. Documentation and minor improvements for context object.
3. Cleaned up element handler code a bit.