Table: create new module with Row.of_line
Table.Row: add function `to_line`
Biocaml: delete trailing white-space
Biocaml: add submodule Table
test: add a small test for Biocaml.Table
Merge branch 'v0.2' into improve_app
Tags: add the `table+separator` tag
Table.Row: make format optional, expose 'sexp'
app.random: add random tables (tab-separated)