Fix installation issues:

- install features as “root” so they can be independently upgraded
- default workspace should be in the user home

Closes #2, #7
Change several defaults:

- UTF-8 FTW
- always run in the background
- show heap status
- always use last launched application
- auto-refresh
- save before build
Added Eclipse Color Theme and a Scala-flavour of Solarized Light

- added the Marketplace Client
- a couple of other setting tweaks
- slightly larger default font.
update lipse default repo kepler -> luna
re-add play2 feature

(cherry picked from commit 405827bb5aa0329414f7c3e9f3f68ae4e2e4e178)
Merge pull request #9 from dragos/issue/installation-fixes

Several installation fixes and new defaults