Update Resources/doc/1-installation.md
Update Resources/doc/1-installation.md

- markdown content fixed in order to get the code-blocks to work
- twitter-bootstrap is now available directly with Packagist, unneeded code has been removed
naitsirch/mopa-bootstrap-bundle,auipga/MopaBootstrapBundle,naitsirch/mopa-bootstrap-bundle,auipga/MopaBootstrapBundle,auipga/MopaBootstrapBundle