Adding right align functionality to cascade.sh.

In cascade.sh the new '-r' option organize windows aligned with the
right border. It is useful when a window that has a smaller width comes
after to one larger, so the right corner keeps aways visible, even when
window focus of the larger one go above the it. See figure below:

NORMAL (ALIGN LEFT)       ALIGN RIGHT
+--------------+          +--------------+
|              |          |              |
|   +-------+  |          |         +-------+
|   |       |  |          |         |       |
|   |   +-----------+     |        +-----------+
|   |   |           |     |        |           |
Change initial setup for highlight space in vimrc

Gabs function to highlight leading and ending spaces and tabs had its
initial state changed from "highlight space" to "no highlight".
Add new IDEA idea--install.config

install.config is a way to automate the installation, update and check
of cfgbin in the system.
Adding ".netrwhist" to .gitignore

.netrwhist is a vim generated temp/log/history file and is not
necessary.