docs: re-structure versioning.
datastore: tests: refactor pb/transaction.
rename createRequest_ to makeReq_
Merge pull request #254 from stephenplusplus/spp--docs-restructure

docs: re-structure versioning.
datastore: parameter: req -> body
Merge pull request #255 from stephenplusplus/spp--pb-refactor

datastore: tests: refactor pb/transaction.
fix(docs): make sure to pass a valid version to semver

When running the docs locally, master could be the only version in versions.txt, and semver doesn't like it.
By hardcoding in insanely high version number, we avoid that while making sure that we get all the modules for the latest version.
Merge pull request #257 from silvolu/docs-local-master-fix

fix(docs): make sure to pass a valid version to semver
readme: spacing fixes
Add pubsub to README
Merge pull request #259 from ryanseys/pubsub-readme

Add pubsub to README
readme: update link system, words, & ex. semantics

- Links from `[title](url)` to `[title][short-name]`.

- Add links to dev.google.com docs next to the product page links (ex: [Google Cloud Pub/Sub][cloud.google.com page] ([docs][dev.google.com page])

- Use more direct wording in pubsub example to illustrate the pulling logic behind listener creation & removal

-
docs: fixes #260 - give method sorting preferential treatment to ctors