Did some linking for the documentation

Signed-off-by: Alexander Cogneau <alexander.cogneau@hotmail.be>
Added --class option to database seeding examples.
Route::resources no longer uses `id` as a parameter

The resource is the id parameter now.
getting executed sql querie from the QueryLog
Improve array_fetch example to show the difference with array_pluck
HTTP Basic Authentication workaround under Apache FastCGI
added short paragraph on accessing inserted id
added paragraph on exception handler ordering
Expanded info on environment detection via machine name
Missing ' in controllers doc, section resources
Simple typo
Merge pull request #455 from besnik81/patch-1

Simple typo in docs
typo on validation.md
Add extending the framework to docs.
Update ToC.
Update extending.md
Document other select helpers for range, years and months
Fixed missing single quote
adding two additional laravel books...

adding two additional books... Implementing Laravel by Chris Fidao and Getting Stuff Done With Laravel 4 by Chuck Heintzelman
Merge pull request #459 from vjandrea/master

Fixed missing single quote