Remove some unused packages
Make ReactiveDict(name) be migrated

Session is now literally one line.

Apps and packages can declare their own private “session-like” ReactiveDicts that are migrated, as long as they choose unique names.

The `Foo = new ReactiveDict(“foo”)` pattern is reminiscent of Collections.
Added a DDP.md to livedata to redirect old links
Move canonicalize.js from public to private
Allow meteor shell script to be run from symlink

Fixes #2462.

Too bad we can't just access realpath somehow...
More clarification on spacebars/README.md

More detail on the way `{{#each}}` chooses keys for elements in an array
Add documentation for WebApp.connectHandlers
Add jsdoc comment for 'check'
Improve documentation of check, add a link from Meteor.methods
Improve docs for check, moving it to the Meteor.methods section
mentions Blaze.render instead of UI.render
Improve documentation for check and Match
Update commands-cordova.js

Dependency on package-client.js is not necessary
Improve the mention of check at the end of methods
Merge pull request #2513 from prapicault/patch-1

Remove redundant package-client.js reference
versions
Invalidate memoization of boilerplate

Fixes bug introduced on the cordova-hcp branch. Fixes #2498
correcting help for meteor add
make getMigrationData private
swap order of if cases