A number of changes and additions:

- template expressions enclosed in {{}} instead of ${};
- any Python expression valid in {{}};
- support for streamed output;
- compiled templates are cached;
- improved Unicode support;
- HTML escape function in namespace;
- option for strip in constructor;
- Python 2.6 compatible.
Merge pull request #1 from suurjaak/master

Merging the improvements by suurjaak