* Modified TDatabaseIniFile and TIniDataReader to handle encoding of database files correctly: they now support legacy default encoding and new UTF-8 encoding. Did this by using bew TMainDBFileReader class to do all file loading.
* Reorganised TDatabaseIniFile so that an internal stream is no longer used: all content from files through to loading of ini file is now processed in an IStringList. This avoids constantly encoding / decoding the text stream.
* Converted some of documentation to XMLDoc format.
