fist stab at format
added docs for newbie hackers
format supports ~%
minimal tests for format
Updated join function in utils.lisp

Used !reduce instead of verbose conditional recursion.
Add the rest of the C[AD]*R functions
Add COPY-TREE function + test
Merge branch 'master' of https://github.com/davazp/jscl
Add :TEST keyword arg to ASSOC
Add SUBST function
Refactor SUBST to use COND
Add POP macro
Only evaluate place in POP once
Fix POP
[reader] write a specific read-integer for reader
Make sure READ-FLOAT returns a float.

Make sure READ-FLOAT returns a float during cross-compilation. (This strategy just embeds a float into the calculation as opposed to an explicit conversion.)
Merge branch 'master' of https://github.com/davazp/jscl
Colorize test output
Failures show up in red, and unexpected successes in orange
abort failed builds instead of soldiering on
silence a couple of unused-variable warnings