Update strigi to 0.6.4

- Path fixes to the build system the benefit of windows users (sengels)
- Clean up of class ArchiveReader
- Support for LZMA compressed streams in archives, notably .deb and .rpm
- Remove preceding ./ from file path in tar archives.
- Make parsing ar and deb files easier to abort: useful in e.g. Dolphin
- Better method of removing deleted file from the CLucene
- Do not tokenize the URL in the index to improve polling speed
- Fix the bz2 header check: more bz2 archives are recognized (pino)
- Fix infinite loop on parsing SGI image files
- Fix reading of zip files without central directory.

Add LICENSE.

(markd)