Merge pull request #1 from royaldark/master

update to latest version
Merge pull request #2 from royaldark/master

update to latest version
Added the change of ns to the testing function
Added add-first and add-last functions
Added tests for conact, they require doall
changed errorgui to make it easier to access the dialog later. Tried changing "always on top" to false in invoke-soon, it didn't seem to work.
Merge https://github.com/elenam/clojure-intro-class
A commit to enable push