migrated android-sdk, camstudio, dia and synkron as automatic packages, added package icons

I had some free time and migrated other four of your packages to automatic packages. In addition I added the missing icons, replaced the android-sdk icon with a more appropriate one (see [package icon guidelines](https://github.com/chocolatey/chocolatey/wiki/CreatePackages#package-icon-guidelines)) and removed unnecessary confusing comments in the scripts.

I also followed the recommendation for [SourceForge for automatic packages](https://github.com/chocolatey/chocolatey/wiki/AutomaticPackages#important-notes-for-files-hosted-on-sourceforge), which is highly recommendable.

These automatic packages were tested by me and work perfectly. I hope you like my work.

By the way, please also merge my other pull request https://github.com/yoshimov/chocolatey-packages/pull/22, which is quite important. I’ve tried many times to contact you, but you didn’t answer.