Merge changes from develop into open source

• rename and reorder distributions for D3Q27
• add boundary condition factory
• added new types of boundary conditions (pressure, geometry)
• add some boundary conditions:
  • NoSlipBounceBack (BBDev27)
  • NoSlipCompressible (QDevComp27)
  • VelocityCompressible (QVelDevComp27)
  • PressureNonEquilibriumCompressible (QPressDevNEQ27)
  • SlipCompressible (QSlipDevComp27)
• clean up boundary conditions VelocitySimpleBounceBackCompressible (QVelDevPlainBB27)
• add the ability to read config files
• some changes in GridGenerator (e.g. new way of creating the GridBuilder)

added gpu label

requested review from @m.schoenherr

assigned to @a.wellmann

added 1 commit

• 2fd2d762 - Tabs to spaces in GridGenerator.h

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approved this merge request

merged

mentioned in commit e5c7c259