Updated the README for v0.3.
s/0.2/0.3/ in documentation links.
Added copyright headers where missing.
Minor documentation updates.
Updated docs for the PushManager class (whew).
Fixed links, formatting, and clarified text throughout the docs.
Trivial table header change.
Added jekyll-generated _site directory to .gitignore.
Bumped the number of iterations in the benchmark app to 100,000.
Renamed and clarified docs for `ApnsConnection#waitForPendingWritesToFinish()`.
Publicized `ApnsConnection` and `ApnsConnectionListener` to avoid showing handler methods without context in `PushManager`.
Merge branch 'v_0_3_documentation_updates' of github.com:relayrides/pushy into v_0_3_documentation_updates

Conflicts:
	src/main/java/com/relayrides/pushy/apns/ApnsConnection.java
Clarified the opening README paragraph and added links to the wiki.
Merge pull request #66 from relayrides/v_0_3_documentation_updates

v0.3 documentation updates
[maven-release-plugin] prepare release v0.3
[maven-release-plugin] prepare for next development iteration
Fixed some bogus link formatting.
Don't create an event loop group with more threads than connections (closes #65).
Fixed a dumb typo.
Keep a static reference to the UTF-8 `Charset` rather than repeatedly getting it by name.