[UI] Update login screen to new UI

[aniri]

The new UI can be found here: https://www.figma.com/file/61NHR7fwmV1Dsv4Pb6F8T7/code4ro_mv_user-management_2018.04.21-(Copy)?node-id=754%3A0

[Botosio]

I can take this one @aniri , Can you add the Hacktoberfest label too please.

[Botosio]

@aniri do you have a better (bigger) icon image???
Halfway done with this.

[Botosio]

@aniri I changed the body color, this will affect the rest of the app. let me know if we should do this or not. All of the mockups has a darker background than #fff.

[aniri]

@aniri I changed the body color, this will affect the rest of the app. let me know if we should do this or not. All of the mockups has a darker background than #fff.

@Botosio it looks great! yes, it's ok to change the background color for the whole app :D I don't have a bigger icon now, but that can be changed later if needed. Thanks for your help!