Several typo fixes
tree527a20cbae17500ad0a836919250a88d496ec21a
-rw-r--r-- 18787 COPYING
drwxr-xr-x - cogito
drwxr-xr-x - course
-rw-r--r-- 164 favicon.png
-rw-r--r-- 275 git-logo.png
-rw-r--r-- 14889 index.html
drwxr-xr-x - stylesheets
-rwxr-xr-x 723 update.sh