Use `$routes->fallbacks()` instead of repeat code

On RouterBuilder we have a `fallbacks()` method that does exactly what we are doing on routes.php.

I think it's better to use the method because this way users known its existence and will use it instead of copy-pasting two lines of code.
Added comment about `fallbacks` method
Merge pull request #86 from elboletaire/patch-1

Use `$routes->fallbacks()` instead of repeat code
Removed unneeded path mapping for composer's autoloader.
Add default flash element.
Revert css class name "message-info" to "message".

Clean up css classes and remove redundant properties.
Merge pull request #88 from ADmad/flash-elem

Default flash element.
Merge pull request #87 from ADmad/master

Removed unneeded path mapping for composer's autoloader.
Fix css for messages.

Remove redundant css classes from homepage messages.
Removed unneeded check for PCRE version.

Hopefully it won't be an issue anymore with newer CentOS versions.
Remove DebugKit check.

It's currently not ready for 3.0 and when it is we can just add it
to composer's require-dev section.
Comment out plugins section until they are working for 3.0.
Merge pull request #89 from ADmad/misc

Misc
Removing Cache dispatcher as it was deleted in core cakephp
Enable identifier quoting in sample db configs.
Merge pull request #90 from ADmad/db-quoting

Enable identifier quoting in sample db configs.
Reset identifierQuoting to false.

Add comment explaining when it should be enabled and it's implications.
Merge pull request #91 from ADmad/db-quoting

Reset identifierQuoting to false.
Remove semicolons and add newline
Remove sql_dump element as it no longer exists.