Extended README for category names with slashes.

Explains how to import categories with slashes in the name.
Merge pull request #99 from mzeis/patch-1

Extended README for category names with slashes.
Added base configurations for EcomDev-Unittests
[+EXPERIMENTAL] Extend Adapter to support multi arrays
[-EXPERIMENTAL] Revert changes from 25cdcc9
[+FEATURE] Transform nested array to multi-line array (ImportExport format)
Added virtual product type to Import Types
Added base test of configuration
Added expectation and provider for simpleProduct-Test
added enhanced invalid value message
Added Test for simple product
[+FEATURE] Provide correct line numbers for nested array imports
Merge remote-tracking branch 'origin/develop' into develop
[~TASK] Adjust improved error messages
[~TASK] Adjust improved error messages, fix coding standards
Updating folder-structure and renaming methods, expectations and providers
Duplicated Expectations and Providers for Default-Value-Test
Added Default-Value-Fixture for Configuration. Load fixture in Test
[+TASK] Add option "Support Nested Arrays for Import"
[+TASK] Add option "Support Nested Arrays for Import"