Anthony Léonard authored Jan 31, 2018 and Adrien Béraud committed Jan 31, 2018

- Version name: In varietate concordia
- Remove "nightly" qualifier in description
- Replace version numbering by date of build
- Update copyright year for 2018 in bundle copyright statement

Change-Id: I30270da07d7dca41323024f63b57ba4595fe9652