• Update TravisCI tests to show coverage.
  
• Update all remaining test files
  
• Get rid of assumption of . in @INC in tests
  
• Remove t/TestDriver.pm
  
• Add t/lib/FileSlurpTest.pm
  
• Make sure all tests use a properly acquired temp file
  
• Clean up prereqs a bit further
  
• Document all failure cases in the 01-error* tests.
  
• Moved the CORE:: function overrides to their own test class to only be
  included when overriding is necessary