Documentation changes and other minor tweaks.

Proposed browser support change.

Adjusting the timing of MPU initialization.

Emitting "finish" event.

Fixing usage error in docs and examples.

Fixing typos.

Upgrading aws-sdk dependency to fix nathanpeck#11

Internal event handler modifications as fix for nathanpeck#10

Releasing 0.6.0 with the merge request from issue nathanpeck#9

Fixing ugly heading size issue in the README.md