release: update release script

work in progress
Release: script release ok for major and minor
Jormungandr: remove useless variable
Merge pull request #351 from l-vincent-l/remove_useless_variable

Jormungandr: remove useless variable
Update readme.rst

Add alternatives
Tyr: add load_data target

add a new target to tyr:
load_data
called with a kraken instance and a data dir.

Launch the data import chain for all the files of that directory
Kraken: force malloc release

when we reloaded the kraken's data with tyr the memory foot print was
twice as big as the real data.

We now force malloc to release the free memory after the swap to reduce
the overall kraken memory foot print.
Merge pull request #353 from antoine-de/force_malloc_release

Kraken: force malloc release
Tyr: do not backup file for load_data target
documentation: synthese presentation modif
documentation: mumoo presentation
Merge pull request #355 from CanalTP/doc_modification

documentation: synthese presentation modif
Tyr: add comment to import_data function
Merge pull request #354 from antoine-de/tyr_load_data

Tyr load data
Release script: correction of a typo
Version 0.96.9
Fusio2ed: check existence of comment column
Merge branch 'release_0.96.9' into release
Version 0.96.10
Jormungandr: Change order of journeys

The first one is now always the best.
Other ones are ordered with the earliest arrival date time first
then by the earliest departure datetime, the order is reversed if the
datetime_represents is departure.