A Version Equipped with Richer Options & More Compressed JS Lib

Based on pre-release version V0.1.3,

[1] Added point.size, point.type, line.width and line.type arguments for line charts;

[2] Added point.size and point.type argument for scatter plots;

[3] Added Step Line Chart. Users can use it by specifying step in line chart functioon.

[4] Figured out the conflict between word cloud and other charts. Now we can use all kinds of charts in one application (previously, the word cloud can't be used together other charts)

[5] Compressed ECharts library file. Also merged the main JS library with the word cloud extension file, so that users don't need to load extension JS file separately for word cloud.