Update README.md
style buttons and tab headers
changed inclusion order of css files, !important no longer necessary
left page padding and less ugly focus
style result table
fix #132 all tabs scrollable when overflowing
remove unnecessary ScrollPanel
add different .gwt.xml file for tests to not include Metanome style
change getModuleName() on all frontend tests
remove loop
Merge pull request #140 from HPI-Information-Systems/css

Looks good!