broken link to i18n behavior docs

Updated the link, maybe would be useful to update the whole doc, but for now it's good to at least provide an usable link to the docs reference.
fix some method names
Merge pull request #298 from dll1024/patch-1

fix some method names
Merge pull request #294 from gattytto/patch-1

broken link to i18n behavior docs
Update runtime-introspection.markdown

forgotten $ in the RelationMaps chapter
Merge pull request #300 from ferjul17/patch-9

Update runtime-introspection.markdown
Added new layout.

Moved behaviors, references and cookbook to documentation folder.
Merge pull request #299 from marcj/new-layout

Added new layout.
slightly color change in links
Fixed responsive view of full-page sites.
replaced favicon with new blue design
Merge pull request #303 from nymo/update-favicon-to-new-layout

replaced favicon with new blue design
Update 03-basic-crud.markdown
Merge pull request #304 from mickaelandrieu/patch-1

Update 03-basic-crud.markdown
Fixed #286 - Added cookbook article about the new test suite.

Fixed some small issue with non-existing pages in the left documentation navigation and the style with strong elements.
Fixed h4 to h3 and a typo.
typos
Fixed #248 - Made clear we support schema attribute for SQLite as well.
Fixed #278 - Added some words for the new possibility to define a n-to-n relation with multiple primary key columns.

And prettified inline code.
Fixed #297 - Added information about the new ability to define a custom collection class.

Also fixed some Collection and Formatter class names.