[refactor dist] Update to `window-stream@0.3.0`
[refactor breaking] `.thru()` is now `.around()`.
[refactor minor] Be lazier when loading reactors.
[api test] Added `.tag()` reactor for setting tags based on values calculated from other reactors.
[api test] Added `.coalesce()` reactor and tests.
[fix] Ensure that tags are properly set before appending to them.
[api test] Added `.meta()`, `.anyMeta()` and `.allMeta()` reactors for working with new `meta` property on data events for working with more structured data.
[doc] Added documentation about new `meta` for more structured data.
[api test] Ensure that `.hasMeta()`, `.anyMeta()` and `.allMeta()` can also optionally take values for keys in `data.meta`.
[minor] Expose some additional things from `common`.
Merge pull request #40 from nodejitsu/feature-meta

Add "meta" property to event data and associated Reactors
[dist] Version bump. 0.4.0
[api] Allow for `.map()` to take an async map function.
[dist] Version bump. 0.4.1
[fix] Properly join writes to Client.
[dist] Version bump. 0.4.1-1
[fix] fixed shouldEmitData so the tests using it wouldn't make the test suite hang
Merge pull request #42 from jcrugzz/fix-shouldEmitData-macro

[fix] fixed shouldEmitData so the tests using it wouldn't make the test suite hang
[fix] Events should be immutable across reactors.
Added Redis Reactor, fixes #7