LSS Zone 1.2.1 beta

- first of all it works again in SU2013 (it was necessary to encode all
*.rb files in UTF-8 _without BOM_)
- encoding issue in 'Attach Labels' tool is fixed: javascript part of
this tool (lss_zone_label_template.js) now escapes only new line
characters instead of escaping the whole string (escaping of the whole
string escaped all non-ascii characters, Russian for example)
- commented table layout was finally cleaned from html dialogs
- small icons for 'rebuild' and 'zoom selection' buttons resized to
20x20px