Updating bytes.ml:

- Bytes.blit_string
- Bytes.extend
- Bytes.init
- Bytes.mapi
- preferring "val" over "external" in the interface


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@232 5e68ba05-c9cc-0310-a7d4-dca2aa431786
doc


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@233 5e68ba05-c9cc-0310-a7d4-dca2aa431786
updates docs


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@234 5e68ba05-c9cc-0310-a7d4-dca2aa431786
prep 1.5.3


git-svn-id: https://godirepo.camlcity.org/svn/lib-findlib/trunk@237 5e68ba05-c9cc-0310-a7d4-dca2aa431786