custom matrix tile color scheme

[cornhundred]

Is your feature request related to a problem? Please describe.
I want to be able to change the color scheme - currently it is only red/blue for positive/negative values, respectively

Describe the solution you'd like
I would like to be able to pass in two colors in the arguments JSON (e.g. named colors or hexcode) and have those override the positive/negative colors.

Additional context
This issue is necessary for resolving this issue in Clustergrammer2 ismms-himc/clustergrammer2#39

[chenmengyu]

I also have this problem.

[cornhundred]

This feature has been added as of Clustergrammer-GL version 0.16.0. The matrix colors can be defined in the visualization JSON network object

      // set matrix colors
      network.matrix_colors = {}
      network.matrix_colors.pos = 'red'
      network.matrix_colors.neg = 'blue'

@chenmengyu