Added tests for first, rest, conj, into
Added examples of add-first, add-last
Some tests for turtle graphics, added exit-on-close
Fixed a condition in is-collection? + a couple tests
Added the source for seqable?
Fixed what probably was a typo in ns. Everything is back to running now. This took a long time.
Merge https://github.com/royaldark/clojure-intro-class

Conflicts:
	src/intro/core.clj
removed assertions, added a few custom-functuions, a few tests for these functions, and a few other tests
a few more tests; a commit before a fairly major rewrite of error matching
It still isn't quite doing the right matching, but it's really close.
fixed handling empty exception messages
Added pascel's triangle and some testing
Merge https://github.com/royaldark/clojure-intro-class

Conflicts:
	src/corefns/core.clj
	src/intro/core.clj
Finished the new error handling
Commit to pull the necessary update
Merge https://github.com/royaldark/clojure-intro-class

Conflicts:
	src/corefns/core.clj
	src/intro/core.clj
added UnsupportedOperationException and a set type. Need more types and more testing.
Discovered that type resolution doesn't work as expected. Need to fix and refactor (it's a mess currently).
This works, but is messy as heck and needs a major retesting of everything
refactored type lookup, tested