Cosmetic: correct some of the comment text
Use correct square crop value (change for tidiness sake: makes no difference in this case)
Make hard linking logic a bit clearer, and comment
Sanitize all shell commands used in ContentManager
Also add a few comments and change some variable names for clarity
Use large rather than enormous (fullsize) jpg when creating smaller versions
make detection of local files into a functio, to ease use in Win OS
Syntax correction
Syntax error 2: omitted semicolon!
Add some unit tests for correct thumbnail sizing