Add a composer ascii-art logo
Updated Doc 00-intro to be more clear

As I was going through the docs, it leads you to do a 'composer install' somewhere where it will not work, if you are following along with installation and such. It is assuming you have a 'composer.json' file in the directory already, which you may not.
Merge remote-tracking branch 'romainneutron/ascii-art'
Only inject logo in help page and not in the app name
Merge remote-tracking branch 'bradp/patch-1'
Rephrase/reformat some of the intro, refs #1450