2019.5.0

Common

• Improve Docs for building documentation (https://openems.github.io/openems.io/openems/latest/documentation.html). Thanks @clehne for the contribution! #603
• Update dependencies: guava, fastexcel, j2mod, jSerialcomm

Edge

• Improve XLSX export of historic data fd903ee

UI

• Hide Component-ID in component update screen
• Add "Edge Profile" page with details about the configuration of the Edge under /device/edge0/settings/profile
  
• Add widget for CHP controller. Thanks @pooran-c! #608
  
• Fix image representing SoC of energy storage system 23dfc17