polling-xhr: fix a comment and remove unneeded `document` reference
Merge pull request #285 from lpinca/fix/comment

polling-xhr: fix a comment and remove unneeded `document` reference
README: more tweaks (thanks @mokesmokes)
polling-jsonp: prevent spurious errors from being emitted when the window is unloaded
Merge pull request #288 from lpinca/fix/polling-jsonp-cleanup

polling-jsonp: prevent spurious errors from being emitted when the window is unloaded
package: bump `engine.io-parser`
rebuild
rebuild
removed unnecessary UA detection
merged with master