[lmi] product editor branch created

[Vadim Zeitlin]

 Hello,

 We have created a new cvs branch called product-editor_branch in the cvs.
It contains the product editor-related work started a long time ago in the
now obsolete mdgrid_branch and brought up to date and improved and enhanced
recently by Evgeniy. This is still experimental code but any comments about
both the code itself and the behaviour it implements would be already very
welcome.

 Thanks in advance!
VZ