[JA] Add Sections: Linux, Maven, Mercurial, SQL

Adding Grammar Correction and Capitalization

BASH and GIT links

Adde the Apigee 'Web API Design' ebook to the 'Software Architecture' list.

[JA] FIX Formatting & ADD sections: Smalltalk, sed, Sather

retroingénierie python

Update free-programming-books.md

added content for MATLAB programming

Fixing a broken link in the Index to properly link to the section below ...

Updating the list to include free Salesforce/Force.com books

Salesforce developers actually have a great resource on Developer Force - http://developer.force.com/ - but I wanted to add some of the books Salesforce has released to this list to share with everyone. Salesforce's languages are Apex (similar to Java) and Visualforce (similar to HTML)

Adding Java EE 7 Tutorial

retroingénirie binaire->c

Adding "A pragmatic guide to Backbone.js apps"

lisp book

Links are not rendered correctly on http://resrc.io/

Update free-programming-books.md

Added some books for Erlang

Added "Guide"

[JA] Add Hatena Textbook Series