Revert "Add exercise list."

This reverts commit bedc587032ea8dd2276692d4299e9333aeb69833.
Fix markdown errors in predicates
Fix small errors from the material
Small tweaks to sudoku
added bootstrap 3.0.0 to the project tree
using bootstrap 3

moved the exercise list into a second column
hide the exercise list on narrow widths
error section changed to warning, because of change in bootstrap
scoreboard for the whole course

the javascript can be reused to make scoreboards for every chapter
multi column scoreboard
Rough first version link to index page
Some bigger warnings to the scoreboard page
Better hints for p-p-p-pokerface/value
Added a clarifying note to those exercises that do not give any points.
Merge branch 'master' of github.com:iloveponies/120-hour-epic-sax-marathon
Fix a typo in predicates/set->predicate
Recursion: add a note: no need to use recursion in singleton? or seq-max
make the non-index-before.html from a real fragment file
navbar with the index link and execise links
reading data from heroku deployment