Added calculation for fit quality. Refs #8601.

1. Refactored codes;
2. Make wiki more detailed on the new features;
3. Add new features including output the deviation of highest peak and
etc.
removed one debug output. Refs #8601.
Cleaned output table workspace. Refs #8601.

1. Both output table workspaces are sorted;
2. Empty lines in output peak position offset table workspace are
removed before output;
3. Codes are refactoed for convenience of modifying.
Refactored the codes. Refs #8601.
Improved wiki and documentation. Refs #8601.

As well as cleaned out the comment and disabled code.  Changed some log
messages' levels.
Merge remote-tracking branch 'origin/feature/8601_getdetoffsets_more_stat'