Fix deprecated function bind
merged branch agiuliano/master (PR #547)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #547).

Discussion
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Fix deprecated function

In AcmeDemoController/contactAction there was the deprecated function $form->bind() instead of $form->submit()

Commits
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b83f3ba Fix deprecated function bind
Created the project basic documentation
Removed Standard's own documentation basic files
Added link to symfony standard edition
Renamed the composer package
Removed the requirement test
Removed Swiftmailer dependance and configuration
Incremented the minimum PHP version to 5.3.17
Used twig without extensions
Used empty (blank) favicons
Removed the changelogs
Removed AcmeDemoBundle
Intercepted redirection in development environment
Added the differences with the standard edition
Fixed composer.json extra commas
Removed broken link to deleted version file