Fixed some more code in the readme file

There were some more errors in the code snippets
Fixes Basic HTTP Authorization middleware
Merge branch 'develop'
Setting response headers before calling WriteHeader in context.String()
Do not update header when status code is less than 1
Improves error log formatting
Adds context.LastError()
Fixes code examples in README
Merge branch 'develop'
Fixes crash when route path doesn't start with '/'
Merge pull request #6 from SkuliOskarsson/patch-1

Fixed some more code in the readme file
Merge pull request #18 from bluele/fixReadme

Fixes code examples in README
Fix JSON Struct example
Extra example
Merge pull request #21 from javierprovecho/master

Fix JSON Struct example
Add GoDoc Badge
Fix
Fix
Merge pull request #23 from javierprovecho/master

GoDoc Badge
Fix README.md