Version 0.0.3 Released.

A quick release after 0.0.2 mostly to fix a bad crash on the command
line tool when charset detection failed (or detected ASCII).

Additionaly:

- The build now includes more test files for various language/encoding
  and a `make test` target for unit testing (20 encoding detection tests
  should be successful upon running it).
- The build has a new BUILD_STATIC option, by default set to ON,
  allowing to disable static library building if not needed.
- All encoding names are iconv-compatible, enabling developers to
  directly feed the result of uchardet_get_charset() into libiconv.
- Compilation warnings fixed.