Update to v0.2.0

Change: Content display now shows download count
Change: Content display now shows NEW! if last update is within 7 days
Change: Added Stats tab to content spotlight
Change: Most downloaded tab in content spotlight now functional
Change: Can no longer install content if dependencies are missing
(temporary; future plans are to install these automatically)
Change: Added sort by downloads
Fix: Could enable content in certain circumstances when requirements
were not met
Fix: Installed content no longer shows both "Install" and "Uninstall"
buttons on content display
API: Added pahub.api.content.getTotalDownloads()
API: Added pahub.api.content.verifyContentDependencies()
API: pahub.api.content.setEnabled, pahub.api.content.enableContent and
pahub.api.content.disableContent now return true on success and false if
they could not complete