Merge pull request #307 from allending/arc-conversion

ARC Conversion: Volume 1
Remove unneeded files, add source file hierarchy
Renamed Engine folder to Core
Remove deprecated KWTestCase and its tests
Use precompiled header instead of import in KiwiConfiguration
Make code style more or less consistent
Merge pull request #315 from allending/structural-changes

Add source file hierarchy
Merge branch 'master' into code-style
More code style changes
Get rid of confusion example suite between example group
Get rid of some example groups builder references
Merge pull request #316 from allending/code-style

Make code style more or less consistent
Merge pull request #317 from allending/renaming-deprecation

Rename KWExampleGroupBuilder to KWExampleSuiteBuilder
Merge 'master' into current branch