Replace QTKit

[Noreaster76]

QTKit was replaced with AVFoundation. This pull request upgrades from the former to the latter. It seems to have resolved a memory leak and subsequent crash in the process. I used to be able to only run the program for a few minutes before the program would crash and my entire machine would automatically restart, and after these changes, it no longer seems to do so.

Unfortunately, in making these changes, I kind of ripped out the functionality for saving images in formats other than JPEG. It can always be put back in later, I guess.

Other stuff included in this PR:

• Add a .gitignore file.
• Update deployment target to OS X Yosemite.
• Update to latest Objective-C syntax.
• Move C code into its own main.m file.
• Add Objective-Clean stylesheet to enforce a style guide.
• Use properties instead of instance variables.
• Remove superfluous comments.
• Rename properties.

[ilovezfs]

@rharder any chance of getting this pull request merged? There's some talk of removing imagesnap from Homebrew since it cannot build with >= Xcode 8 but that would be a shame since we've had 340 installs in the last 30 days alone.

Cf. https://github.com/Homebrew/homebrew-core/pull/18837

[Noreaster76]

@ilovezfs I haven't noticed any activity from that account ( @rharder ) within the past few years with respect to this repo. If it's allowed by Homebrew, going forward, you may want to consider using a fork of this repo instead (and not just on a patch basis).

[ilovezfs]

@Noreaster76 the general rule in Homebrew is that it's allowed if the original upstream endorses the fork or if the fork adopts a separate project name and meets the notability requirements in its own right.

[ilovezfs]

@Noreaster76 in terms of alternative ways of contacting @rharder with your patch I see

http://kontactr.com/user/rharder and https://sourceforge.net/p/iharder/bugs

[rharder]

Sorry - not sure how I missed previous comments, but I see there's a merge request ready to go. I just merged it, but I haven't gotten in to mess with imagesnap in a while. Not sure about it building, but I know I use an old build of the binary, and that still works great as of summer 2017.

Not familiar with homebrew (I use ports). How can I help get this integrated?

-Rob

[ilovezfs]

@rharder thank you for merging! The best way would be to create a new release tag here https://github.com/rharder/imagesnap/releases