remove redis in manual install
sync irma common part
split irma common part in intro and install parts
remove config dialog for redis
change default db name to quota and remove redis configuration
fix version
update common requirement
update screenshots
fix default path for sqlite db
update default sqlite db name
update config dialog and default values
update doc for brain.ini
fix typo in settings key
Merge pull request #5 from quarkslab/update-doc

Update doc
fix screenshots size