compression date uses UTC. New class for log item.
Datafield and HeaderText were mixed up.
new method for help text creation.
move cmdline aliases to attributes. use Reflection to validate switches given by user
take args on cmd line. Uses same as optimizer. Ignores args it doesn't use.
Merge branch 'philoushka-master'
updating optimize-images.ps1 and nuspec versions
updating arg help
Merge branch 'master' of github.com:ligershark/AzureJobs