Add 2 ebooks free about javascript
Merge branch 'master' of https://github.com/vhf/free-programming-books
Alphabetizing the ebooks in section about Javascript(PT-BR)
Merge branch 'master' of https://github.com/vhf/free-programming-books
Delete duplicate Django entry for Tango With Django
[es] Added Python book for beginners
Merge pull request #667 from rnevius/master

Delete duplicate Django entry for Tango With Django
[de] Adding Programmiereinführung mit Python
[en] Introduction to programming with Python
Merge pull request #668 from esparta/master

[es] [en] [de] Introduction to programming with Python
Add two lines in the end section javascript
Merge branch 'master' of https://github.com/vhf/free-programming-books
Merge pull request #662 from NandoKstroNet/master

Add 2 ebooks about javascript
Fix Go's 404 error
Alphabetize Go list
Add ISL to Machine Learning
Move ESL from Data Mining to Machine Learning
Merge pull request #669 from jdavis/master

Add ISL, change ESL to Machine Learning
Merge pull request #670 from Mouseion/patch-go

Fixes for Go list
Added Machine Learning books