implemented completely
add fixed-arity pic_values function
add pic_assert_type
add pic_data_type_p
cleanup
initial regexp support
update readme
Merge branch 'regexp'
add a note on the dependency on regex.h
revised readme
grammer fixes
add native box API
fix #36
refactoring. use boxes.
Merge branch 'issue-36-5', close #36, close #85.
Merge pull request #79 from stibear/srfi26

srfi26
load 26.scm at init.
update xfile. close #80.
implement syntax-rules
need to fix
* number->string
* check-vars
* vector pattern/template
add SWAP macro