In order to build this you will need:
- perl (>=5.6.0)
- perl module Digest::SHA1 (for debian: apt-get install libdigest-sha1-perl)
- gettext 0.11.x

changes in 0.2.1:
- table-driven default message handler
- basic adding of methods at runtime
- simple reflection mechanizm (query for method existence)
- CO_ATTR ridded of first (redundant) argument

changes in 0.2.0:
- now officially standalone project
- new code preprocessor: copp
    - new ID model
    - new method definition style
    - new message handler
- improved co_m_v performance - no more COX_TRY block there
- improved packaging
    - removed intl/
    - upgraded to gettext 0.11.5
    - fixed libltdl problems - ltdl.[hc] is now included in libco if
      needed
- prepared to import into platon cvs