Switch to new Travis and enable caching
Merge pull request #1278 from WonderCsabo/dockerTravis

Switch to new Travis and enable caching
Consider numbers in CaseHelper

CaseHelper.camelCaseToSnakeCase completely ignored numbers before this
commit.
Add missing licence headers
Merge pull request #1282 from WonderCsabo/1268_considerNumberInCaseHelper

Consider numbers in CaseHelper