Merge from V6_main_20120808 08Aug12
Merge from BR_V5_DEV 16Feb09
Join modifications from BR_Dev_For_4_0 tag V4_1_1.
Join modifications from branch BR_DEBUG_3_2_0b1
Join modifications from branch OCC_debug_for_3_2_0b1
Copyrights update
Using files from package LightApp instead of files from package SalomeApp
Add in GUI control for merging equal elements