Merge branch 'master' of github.com:vhf/free-programming-books
Merge remote-tracking branch 'central/master'
Merge remote-tracking branch 'central/master'
Merge remote-tracking branch 'central/master'
Adding Python interactive tutorial
[en] Added CIS 194: Introduction to Haskell
Merge pull request #917 from Pythagory/master

Remove High Performance Drupal - Not Free
[es] Adding a misc. book
Merge pull request #919 from esparta/master

[es] Adding a misc. book
Merge branch 'master' of github.com:guillaume-nargeot/free-programming-books into guillaume-nargeot-master
Correct #918
[en] Sorting Machine Learning section
[en] sorting Ada section
[en] sorting Assambly Language section
Re-added Category Theory for Computing Science with udpated link.
Merge pull request #920 from jeffdc/master

Re-added Category Theory for Computing Science with updated link.
PDF about language php
Add EmberFlare and Dockyard tutorial
Merge pull request #922 from h0lyalg0rithm/patch-1

Add EmberFlare and Dockyard tutorial
Merge pull request #921 from gutierri/master

PDF about language php