Removed global node style overwrite
We've been overwriting the style for node which was breaking uml
diagrams.
\usetikzlibrary{fit}
\tikzset{
- every node/.style={above},
start state/.style={draw,ellipse,text width=0},
state/.style={draw,ellipse,align=flush center,text width=2.5cm},
box state/.style={draw,rectangle,align=flush center,text width=2.5cm,inner sep=7pt},
