Merge pull request #145 from rgrinberg/master

fixes #144
bump to 0.12.1 and move conduit.lwt UNIX dependency to the right place

Closes #151
move back to 0.12.0, since this is unreleased
Travis: s/irminsule/irmin to reflect name change
Merge pull request #152 from avsm/remove-conduit-unix-depends

move conduit.lwt UNIX dependency to the right place
Split Fixed uploads into chunks

Instead of reading the entire upload into a single string, we now
return one chunk each time the underlying [read] call returns some
data. This avoids using large amounts of RAM, hitting the 16 MB
string limit on 32-bit systems. It also allows the application to
begin processing the data before it has all arrived.

Fixes #153.
Merge pull request #154 from talex5/streaming-uploads

Split Fixed uploads into chunks