Update to upstream version '0.0.13'
with Debian dir 439aa89bb06c7be06d404762c3794fc4e105500e

The subversion loader (T680) has shown that throwing floating point values
around for timestamps is a mess waiting to happen.

We now coerce all clients to send us timestamps as integer numbers of seconds
and microseconds, avoiding data losses everywhere.

Update to upstream version '0.0.12'
with Debian dir 4a001e17c2684cfef3b0db63e6fcadcb8171e22f

- default
- ignoring empty folders
- ignore folder based on pattern in names

Update to upstream version '0.0.11'
with Debian dir a108f7c4dbea9105ec578d819bf6d8c357e6501c

Update to upstream version '0.0.10'
with Debian dir f15cce5a06b2f6487de49dd32123ca52507d8d3d

This permits to reuse the same logic for different clients (loader-dir,
loader-tar, loader-svn)

(Tests were lost)

This actually is supposed to replace
walk_and_compute_sha1_from_directory.
The data structure used here is better at handling updates.

(Code that actually got lost and rewritten - Tests are definitely lost though)

Keep the old api (since i don't measure the impacts on other modules yet).

+ Improve docstring

(Code that actually got lost and rewritten)

Update to upstream version '0.0.9'
with Debian dir 43fe71cfe2540cb75fc3848e25e7d4d8e65cdee6

Update to upstream version '0.0.8'
with Debian dir 2ebe42f6f56469dedd2e7bb2c7b326de8bf6bfa3

Combination of:
- validation on files
- ignore empty folder