BitShares Documentation Portal website

@tsugimoto prepared an outline of how she unofficially proposes to update the BitShares/Graphene documentation which was mostly prepared by @xeroc.

• Some of the proposed work involves re-organizing the content structure
• Other parts involve initially placing focus on the developers as an audience; other audiences would be addressed after first addressing technical points because could be summarized and/or described in a way that is easier for less technical readers
• Reduce the depth and jumping around of the contents