Added images option to features list
Added default option to Light and Medium parsers
Migration to MichelFortin's implementation.

Since flydev has marked his version as deprecated (it was a simple composer port of Michel Fortin's initial project), it seems good to revert the dependency to the stable/continued project.
Remove deps base installation instruction
Drop support symfony 2.0
Removing overriden method for fencedCodeBlocks.

Michel Fortin's implementation is able to handle the fencedCodeBlock without any escaping mecanism.
Merge pull request #48 from tamirvs/feat-images-option

Added the option to disable images
Updating testsuite to Michel Fortin implementation.

The footnote behaviour has changed during migration. You might want to check out the pr mentionning it : https://github.com/KnpLabs/KnpMarkdownBundle/pull/50
Merge pull request #50 from iammichiel/master

Migration to MichelFortin's implementation.
Make the Sundown parser implement the renamed method from the parser interface
Merge pull request #51 from elnur/sundown-fix

Make the Sundown parser implement the renamed method from the parser interface