Update configuration.md

Update Configuration File for Nginx in order to correct bad configuration for /install directory.
Merge pull request #87 from driou/patch-1

Update configuration.md
Add new documention about forms
	modified:   _config.yml
	modified:   en/documentation/form/action.md
	new file:   en/documentation/form/controller.md
	modified:   en/documentation/form/index.md
	modified:   en/documentation/form/template.md
Added some information about module_include transition and naming convention
Add collection doc
	modified:   en/documentation/form/template.md
Merge pull request #88 from lovenunu/form

Add new documention about forms
Merge pull request #89 from bibich/hooks

Added some information about module_include transition and naming conven...
Add api needed files
new file:   en/documentation/api/authentication.md
new file:   en/documentation/api/create_your_own_controller.md
new file:   en/documentation/api/routes/attributeav.md
new file:   en/documentation/api/routes/customer.md
new file:   en/documentation/api/routes/image.md
new file:   en/documentation/api/routes/product.md
new file:   en/documentation/api/routes/product_sale_elements.md
new file:   en/documentation/api/routes/tax_rule.md
new file:   en/documentation/api/routes/title.md
Updated the update process
Add sidebar and "title" doc
	modified:   _config.yml
	new file:   _layouts/api.html
	modified:   en/documentation/api/create_your_own_controller.md
	renamed:    en/documentation/api/routes/image.md -> en/documentation/api/routes/product_image.md
	modified:   en/documentation/api/routes/title.md
Complete customer title and tax rules
Add readonly routes
Add customer controller doc
Many fixes
Finish routes
add controller page
finish API doc
Add warning with ssl
Code review
Merge pull request #90 from bibich/update

Updated the update process