5.2.7: 
* update --version output
* Added full readline history commands, when readline library is available.
* We put in test for readline history library to compile conditional code if readline is installed.

5.2.6:
* csh command completion
* improve iconsize control with range (process jumps correctly)
* fixed problem of rename/symlink/duplicate not working on remote connections managed by XMingw
* Code optimizations and improvements for handling rodent-pkg plugin
* avoid g_error shutdown by signal 
