updated Oscad-Book with all content included
deleted BookOnOscad.tar.gz which was not needed
corrected the spelling mistakes on the Oscad Tool bar
updated OSCAD_installer
deleted unnecessary files fromthe Examples folder
deleted unnecessary files from the Examples folder
deleted the Examples folder from OSCAD
Subject: see below for detail description of changes

Description:

1) added Examples:
   - BJT_amplifier
   - RC
   - RC_pcb
   - RC_ac
   - nodalExample_plot

2) changed 'gnome-terminal' to 'xterm' in
`OSCAD/forntEnd/newProject.py`

3) OSCAD desktop icon `oscad.desktop`
   iccon location: /usr/share/icons/oscad.png

I have made the changes in OSCAD/ directory and also in OSCAD.tar.gz
archive inside OSCAD_installer/ directory