Full working version with documentation

What's Changed

• Feature/modular error by @maxreiss123 in #20
• Feature/modular error by @maxreiss123 in #21
• Feature/modular error by @maxreiss123 in #22
• Feature/modular error by @maxreiss123 in #23
• create test folder by @maxreiss123 in #24
• Feature/modular error by @maxreiss123 in #25
• Feature/modular error by @maxreiss123 in #26
• Feature/modular error by @maxreiss123 in #27
• Hot fix on indices by @maxreiss123 in #28
• Feature/modular error by @maxreiss123 in #29
• hotfix point op by @maxreiss123 in #30
• Feature/modular error by @maxreiss123 in #31
• Feature/modular error by @maxreiss123 in #32
• fix cahche blow up by @maxreiss123 in #33
• hotfix for deadlock by @maxreiss123 in #34
• fix_concurrency issue by @maxreiss123 in #35
• Feature/modular error by @maxreiss123 in #36
• change by @maxreiss123 in #37
• Feature/modular error by @maxreiss123 in #38

Full Changelog: v0.4.0...v0.5.0

The version is fully working with a decent level of documentation.
Some functions are not 100% accessible via the Wrapper interface
All test run green

This release contains a fully working gene expression programming implementation.