new tax category route is invalid, we can't have an id in this route
fix tax rate index route, "tax" is missing in sylius_rate_index route
categories is undefined but we have a "tax_categories" variable
sorting inside tax categories didn't work

we use _sortable: true instead of _sylius: { sortable: true }
tax_rate_create route can't have an id as mandatory parameters
tax_rates variable is pass to macros so we have to use this instead of rates
fix sorting for tax rates page
tax rate show page is empty, i've just add some columns in a table

the table is the same as the one in the WebBundle without the "zone"
column
fix delete button to use a form instead instead of one link

i used the same form which is in Macros/buttons.html.twig
I have to use a trick to keep the same design for btn-group :
http://stackoverflow.com/a/17603157/1731820
remove useless class and comment

the input hidden has to be before the button, to make the button part of an btn-group
Merge pull request #461 from BenoitLeveque/fix-standalone-taxation-bundle

Fix SyliusTaxationBundle when it's use as a standalone bundle