Update dependencies to fix open vulnerabilities.

Open vulnerabilities (via Gemnasium):

ALERTS FOR ACTIONPACK (REQUIRED BY FACTORY_GIRL_RAILS, JQUERY-RAILS, RSPEC-RAILS)
- CVE-2013-4491 - REFLECTIVE XSS VULNERABILITY
- CVE-2013-6417 - INCOMPLETE FIX TO CVE-2013-0155 (UNSAFE QUERY GENERATION RISK)
- CVE-2013-6415 - XSS VULNERABILITY IN NUMBER_TO_CURRENCY

ALERTS FOR I18N (REQUIRED BY ACTIVESUPPORT)
- CVE-2013-4492 - REFLECTIVE XSS VULNERABILITY
Merge pull request #40 from JanDintel/fix-vulnerabilities

Update dependencies to fix open vulnerabilities.
Let's use Markdown for the README
Remove the rdoc README
Add links to the company and author in the copyright statement
Improve the overall readability by: adding links, syntax highlighting and formatting.

Make a list of the supported bindings

Format the XML and fix the syntax highlighting

Let's use the Rails 4 query method

Fix the indentation

Fix the XML syntax highlighting

Fix the indentation

Fix tiny typo
Merge branch 'readme' of github.com:JanDintel/libsaml into JanDintel-readme