Specify various licenses

This PR adds license specifications to these casks:

+ `vmware-fusion`
+ `moom`
+ `parallels`
+ `omnifocus`
+ `kaleidoscope`
+ `skype`
+ `adobe-creative-cloud`
+ `notational-velocity`
+ `spotify`
+ `transmission`
+ `seil`
+ `hex-fiend`
+ `imageoptim`
+ `cyberduck`
+ `java`
+ `appzapper`
+ `viscosity`
+ `netnewswire`

Source, when appropriate, is specified in detailed description of a commit.