Added support for lazyseq + tests
Merge pull request #26 from jolby/merge_lazy_seq

Added support for lazyseq + tests
Moved test files to more properly named directory.
Add original test suite from ClojureScript.
Make `for` work.
StringBuilder.
More printing.
Make print function in the preamble also print strings.
ILookup for String.
ILookup for Array.
IReduce for Array and String.
true? and false?.
take and iterate.
Atom.
empty.
Emit meta for empty list.
nthnext.
not=.
Various seq functions.
comp and partial.