better identify :format segment of barista routes

barista nested resources will produce routes with :nestedmodel_format segments and thus do not pass the `val.path === '.:format'` condition. Using a regexp to match any :[a-z]+_format will allow nested resources to be used.
correct nested resource comment

Not documented, but Barista will nest resources with the syntax shown in the commit.
include snake-case multi-word in :format regex

ProductCategory would turn into :product_category_format and thus needs this modified regex.
Merge pull request #599 from Hagendorn/master

Minor tutorial fixes
add hebrew locals
Merge pull request #603 from omerlh/master

add hebrew locals
Merge pull request #584 from jbielick/master

Enabling nested resources.
Add a "POST" example for request

It needs to set 'Content-Type' in headers explicitly, when use geddy.request to do a "POST" request.
Or else the data parameters couldn't be passed in. And there is no 'POST' example there.
So add an example for 'POST' request. it's related to Issue #604 (https://github.com/geddy/geddy/issues/604)
Merge pull request #606 from tracylv/master

Add a "POST" example for request
Fixed typo
Model init needs to look for model.config props, not props on model NS object
Update helpers.md

Mistake in code in `styleLink` section
Merge pull request #609 from mightydes/patch-1

Update helpers.md
Removed deprecated loadedAdapters references
Merge branch 'master' of github.com:geddy/geddy
Fix code which do not work in strict mode
Fix indent
Merge pull request #611 from phanect/strict-mode

Fix code which do not work in strict mode
Hoisting
Use octal for mode