Add CastError check
[Fixes #80877012] Add test for casterror
Oops. Remove x from xdescribe
Merge pull request #71 from rafkhan/cast-error-mongo-mapper

[#80877012] Cast error mongo mapper
Release 0.4.4
[finishes #81400128] feat (koast) report koast version in header

- for use with [80580556] - having koast-angular know if versions match
- created middleware called version-reporter
- replace x-powered-by header with 'Koast' instead of 'Express'
- adds x-koast-version header that reports version from package.json
Merge pull request #72 from e-schultz/feat-report-version-in-headers

[finishes #81400128] feat (koast) report koast version in header