#330 Added tree layout object
#330 Mapped appropriate data to tree layout
Merge branch 'issue330_d3layout' of https://github.com/thechiselgroup/biomixer into issue330_d3layout
#330 Added transaction to tree layout
#330 Added function for retrieving index of the root node
#330 Added radial layout button and a stub method
#330 Fixed tree layout: assigned correct values to graph nodes
#330 Added vertical tree
#330 Radial layout in progress
#330 Improved radial layout
#330 Scaled radial layout
Merge branch 'issue349_refactoring_typescript' into issue330_d3layout
Merge branch 'master' into issue330_d3layout
Merge branch 'master' into issue330_d3layout
#330 Moved layout code to typescript
Merge branch 'master' into issue330_d3layout
Merge branch 'issue330_d3layout'
#330 Changed SVG ids used in layouts to match new ones, for merge.