change landing page and other ui fixups

- add more padding to profiler navbar
- add title attribute to navbar items
- make landing page font bolder
- remove curvature from landing page header/footer
- align buttons on build and deploy
- add spacing below toggler
Merge pull request #800 from strongloop/feature/ui-cleanup-ga

change landing page and other ui fixups


- add more padding to profiler navbar
- add title attribute to navbar items
- make landing page font bolder
- remove curvature from landing page header/footer

#791