stylize readme

Signed-off-by: Ladislas de Toldi <ladislas@weareleka.com>
training space

Signed-off-by: Ladislas de Toldi <ladislas@weareleka.com>
readme

Signed-off-by: Ladislas de Toldi <ladislas@weareleka.com>
Merge pull request #5 from WeAreLeka/dev

updated readmes