added viz library namespace instaparse.viz
 On branch master
removed test grammar and call of tree-viz
knocked out loading instaparse.core, not actually needed
algorithm simplified courtesy @Engelberg
removed inherent rhizome dependency, added try/catch
 On branch master
try/catch without namespace and project dependency fails to load rhizome.viz
 On branch master
 On branch master
Merge branch 'master' into v1.2

Conflicts:
	src/instaparse/viz.clj
 On branch v1.2
Merge branch 'v1.2' of https://github.com/mnemnion/instaparse into v1.2

Conflicts:
	src/instaparse/viz.clj
added enlive visualizer and supporting functions. NB: the namespace trick
does not succeed in loading rhizome on my system, where it is in fact installed.

 On branch v1.2
...modified viz.clj actually included this time
 On branch v1.2
Merge pull request #34 from mnemnion/v1.2

V1.2 enlive visualizer added