Proto commits in littleorca/ferris-wheel

These 6 commits are when the Protocol Buffers files have changed:

Commit:23dfd2c
Author:littleorca
Committer:littleorca

Replace handsontable totally.

Commit:151c78b
Author:littleorca
Committer:littleorca

Add form feature (breaks compatibility).

The documentation is generated from this commit.

Commit:1a02ca9
Author:littleorca

Introduce plotly.js to replace chart.js; Add formatting support to chart axis.

Commit:0c186f6
Author:Liu Haifeng

Add format control to pivot value, update protobuffer.

Commit:950d14a
Author:littleorca

Add formula-based three phase aggregate as custom pivot aggregator; add cell format option; change name reference quote to single quote(currently accepts both, but single quote will be the only option in the future).

Commit:4082145
Author:liuhaifeng

Init project.