Merge pull request #35 from spaceone/master

fixed a lot of typos and add latest links
Text implies RESTful is completely stateless which isn't entirely
true as the client may hold state. Made changes accordingly.

See http://en.wikipedia.org/wiki/RESTful#Constraints
Merge pull request #36 from namsral/master

Inaccuracy in describing RESTful's statelessness
fix typo
Merge pull request #37 from jasssonpet/patch-1

fix typo
Update 2012-12-14-richardsonmaturitymodel.html

Cleaned up the page a bit and some confusion around HTTP as a transport protocol (it's an application protocol that, at level 0, can be used like a transport protocol).
Merge pull request #39 from fiddlerpianist/my2cents

Update 2012-12-14-richardsonmaturitymodel.html
Add new presentations and fix a typo
JSON-LD is a W3C standard: Update the text and the link to the spec
Merge pull request #41 from lanthaler/fix-typo-add-presentations

Add new presentations and fix a typo
Merge pull request #42 from lanthaler/json-ld-is-w3c-standard

JSON-LD is a W3C standard: Update the text and the link to the spec