[MORE]: Rewrite almost completely the MORE command, taking advantage of the console...

[MORE]: Rewrite almost completely the MORE command, taking advantage of the console pager functionality of the ConUtils library (see CORE-10504 and commit r73024).
- When displaying files, display the percentage of file read so far in the "Continue" prompt. Otherwise (when being piped or feeded from StdIn), just display the "Continue" prompt without percentage.
- Try to detect the text file encoding (ANSI, UTF16-BE/BE w/ or w/o BOM; UTF-8 to do!!) before displaying it. See the code for more details.

NOTE that the other functionalities of more (being able to scroll one line at a time, other command-line switches, etc...) are still not implemented yet.

svn path=/trunk/; revision=73025