Give LifeApp two column layout; shrink EcosystemGrid

To make room for a coming-soon game index on the left, the LifeApp now
has a two column layout. The grid also was made half it's previous size,
to make room for the index on the left and accomodate small screen
sizes.
Add lodash

I specifically wanted to use the 'isEmpty' method, and could also use
the lodash 'merge' instead of the helper provided with React.
Load lodash and react from node_modules

I configured webpack to load lodash from the node_modules directory.

I also configured webpack to allow a variety of file extensions, and
replaced the use of the react helper 'merge' with the lodash 'merge'.
Add GameIndex component and render in LifeApp