init properly config file

with devces array set in the config file
Merge branch 'master' of github.com:Kloadut/cozy-data-proxy
improve code styling
remove wrong callback call in create desing function
add comments to config module
improve code style for replication module
up pouchdb version
extract and name callbacks in db module
refactor

* name and extract all sub functions
* put two lines before each functions
update client libs
make frontend developable
add styling
create first component
add button to save device name field to config
[fix] Chain downloads to avoid conflicts