Parameterize the Promises in WebIDL.
Change data attribute to nullable DOMString.
Merge pull request #8 from mvano/PromiseParameter

Parameterize the Promises in WebIDL.
Merge pull request #9 from mvano/DataAttributeIsString

Data attribute is nullable DOMString
Delete all references to the version attribute.

As discussed in the mailing list, the version attribute is redundant
with the data attribute.
Merge pull request #10 from mvano/DeleteVersionAttribute

Delete version attribute
fixing unregister method to allow single registration per webapp
changing registrations() into getRegistration() as there is single registration per webapp
single registration per webapp
PushRegistration interface clarifications
Addressing comments
Merge pull request #12 from efullea/singleReg

Single registration per webapp
Merge pull request #14 from efullea/pushRegistration

PushRegistration interface clarifications
Clean up ReSpec config.
Clean up terminology section.
Link to the specification and communication channels from the README.
Merge pull request #24 from jyasskin/patch-1

Link to the specification and communication channels from the README.
Merge pull request #21 from mvano/RespecTweaks

Clean up ReSpec config
Merge pull request #22 from mvano/TerminologyCleanup

Clean up terminology section
Add tidyconfig and tidy the spec.