#316 added new welcome page.
#316 changed order of metric boxes
#316 Added codepens for example section
#316 adding getting started section.
#316 progress with getting started section. most content added.
#316 progress with pushing data section.
#316 Added visualization section.
#316 progress with welcome screen.
#316 progress with welcome screen.
#316 tests re-aligned
Merge pull request #317 from joola/feature/#316

#316 added new welcome page.