Corrected project Url in Readme.md and branch name
Corrected project Url in Readme.md and branch name

The project urls were missing the `-` in `code-school` causing them to 404, these urls have been corrected. In addition to this the `solution` branch was incorrectly called the `answer` branch in the Readme.md file.
jackmckay/HelloCodeSchoolProject,jackmckay/HelloCodeSchoolProject