Merge pull request #21 from blink1073/master

Fix Merge Errors from Previous PR
Run/checked a first batch of matlab notebooks.
Almost finished compiling the matlab notebooks.
finished compiling matlab notebooks
Corrected python tours.
Added zipped toolboxes.
Removed data/ toolbox.
updated installation instruction
Merge pull request #28 from blink1073/master

Fix the Optim_5_Dual Matlab Tour
Refactor the conversion constants and add new intro text
Do not batch convert the matlab notebooks anymore
Re-run the python notebooks and solutions
Merge branch 'master' of https://github.com/gpeyre/numerical-tours
Add a script to fix the matlab intros
Remove extra quotes from intro text
Fix the intro instructions on the matlab notebooks
Fix the extra quotes in the python notebook instructions