Initial commit
Add library build directives; fix bug in str
Fix string function

The length of the string is not necessarily the same as the length of the array
containing it.
Add tests
Rename test --> tests; add test.do
Add comment
Revise comment; replace CHR with char
Add str_itoc and unit test; fix bug in build system
Code cleanup
Code cleanup
Add tools dir and 'hello' tool
Fix bugs in build system
Code cleanup
Remove hello; add copy
Add tests to tools; add copy test
Revise build system
Add do files
Code cleanup
Revise build system

Prepare to eliminate separate 'dist' and 'debug' builds. Consolidate everything
into one 'build'.
Eliminate DEBUG compilation flag