Sphider 4.0.0-MB and SphiderLite 2.0.0 released

The backup and restore utilities have been reworked to use MySQL directly. This provides higher dependability than depending on PHP.  Also, a limited ability to resume a re-index process which has been interrupted has been introduced. The process to determine page character set has been enhanced. Language file conversion to Unicode has been completed. Obsolete versions of code have been removed and general code cleanup done. Further safeguards against indexing of illegal characters has been implemented. SphiderLite has had more remnants of the full version removed.