don't forget install.ml during the bootstrapping. fixes #18.
bump version
load findlib configuration when using obuild-simple.
make sure that trailing / in path doesn't count toward a mismatch of findlib/ocaml.
parse string with escape in META.
parse constraints expression better (WIP)

As a side effect, the builddeps will error when having badly formatted
dependencies making sure the user is notified that the build-deps format
is invalid. for example using space instead of comma to separate fields.

fixes #19.
add a way to specify extra tool as dependency
check in configure if tool are present.
add a way to call a script during configure (WIP)
parse '+=' after a requires the same way as '=' for now.

Most of times += is actually equivalent to = as apparently it's very often misused.

improves slightly the error message to actually be comprehensible. just.

fixes #20.
add an alias to builddeps.
misc improvements

* add a way to specify per group of file flag/deps.
* keep the structure in pp until the last moment.
* refactor the syntax gathering.
* better debug grammar
* add some simple DAG tests.
* add a way to show test's output.
* add TODO items
* put color in success/fail.
reorganise
move ext into its own library.
remove unneeded dep
modify ext to build a pack, and rename Ext as Ext.Fugue
move filepath and filesystem to ext.

cleanup all related include/open
add oasis convertion tool skeleton.
changed dependency handling to print all missing dependencies at once
Merge pull request #24 from rgrinberg/master

Tiny fix for obuild to print all missing dependencies at once