Greenstone 2.62 released

This is a stable release -- it does not contain much new functionality over v2.61, but
does contain many bug fixes and other minor improvements.

Important changes in this release include, in no particular order:

- PS and PPT files can now be converted to images for use with PagedImgPlug
- Faster file copying in the GLI, especially with Java 1.5
- The GLI will now restart the Local Library if it has stopped running (Windows)
- A new version of expand_macros.pl, by Jens Wille
- A new plugin for processing Real Media files, by Xin Gao
- More fixes for searching with Lucene
- An estimate of the total data size when writing a CD/DVD image from the GLI
- A "-no_metadata_formatting" option for classifiers, to turn off "helpful" sorting
- A fix to a nasty GLI bug where all the metadata in a folder could be lost (rarely)
- ...and many many other improvements and bug fixes