scaling grade chart differently
removed breaking into different layout on large

adjusted column widths of session list for small screens
beautified chart
disabled user page zooming

formatted index.html
unified colors
restriction of content to 1000px is now done in index.html

if I broke any CSS layout stuff, it probably happened in this commit
restyled and customized top nav bar
calculating trend
fixed comments concatenatio
switched moment to german locale
added create session page with dummy content
added edit session page with dummy data
showing gym name in stats
displaying current session in edit session
added coloring directive and service

using coloring service in gym-floor-plan directive
fixed typo in filename
factored out styling of ascent counts