Only lowercase first character of element names.
Strip leading and trailing underscores from element names.
Upgrade to hxt 9.2 and 9.3.
Fixed recursive xml schema generation in pickler.

Instead a self-reference is created.
Add more specialized/shortcut instances.

We can now generically pickle Text, and Maybes in records are handled
as well.
XmlPickler instance for Either.
Move 'no orphans warning' setting to specific file.
typLAB -> Silk.
Add CHANGELOG and bump version to 0.2.
Add source repository to cabal file.
Add README.