Add changes to README

Add changes to README.
Test

Test commit
Merge branch 'master' of abubakr.taqisystems.local:/var/cache/git/repositories/nsh

Merge branch from upstream from yellowman.
Merge branch 'master' of github.com:muhammadn/nsh

Initial merge from personal github account.
Removal of test file

Removal of test file.
Modify prompt

Modify the default prompt from "/" to ">" for easy reading.
Change of nshrc location

Modify save-ro.sh and save-rw.sh to a new location (/config) for configuration files.
Change of nshrc location

Change of nshrc location from /etc to /config for easy read and write.
Change capitalization

Change capitalization from "protocol" to "Protocol".
Disable shell

Disable user from executing a subshell.
Merge branch 'master' of www.taqisystems.com:/var/cache/git/repositories/nsh
Add Banner support

Add Banner support in MOTD to provide information for network administrators.
Add credits

Add copyright credits to source.
Add MOTDCONF

Add MOTDCONF parts of for configuring banner information.
Syntatic error

Syntatic error of motd_ctl
Supporting files for MOTD

Supporting files for banner/MOTD.
More syntatic errors

Syntatic errors
Add values for bannerhelp[]

Add values for bannerhelp[] to display help message
Syntatic error

More syntatic errors
File options for MOTD

File output options for MOTD