Lots of small improvements. (Detailed list & explanation inside.)

[regexident]

Hi Leigh,

I took the liberty to do apply refactorings (API compatibility not affected) and modernization cleanups.

Code Modernizations:

• Moved from retain to strong in properties.
• Moved from - (id)init… to - (instancetype)init…

Cleanups:

• Unified use of whitespace around asterisks.
• Renamed "…Url" to "…URL" to better mirror Apple's framework naming standards.

Safety:

• Moved from retain to copy in properties with potentially mutable values.

Swift compatibility:

• Moved block arguments to end of function signature (while remaining API-compatible via backup method marked as deprecated for the time being).

Refactoring:

• Simplified delegate and added asserts to it.
• Enabled localization of access panel via use of "NSLocalizedString(…)".

Unit Tests:

• Added some basic unit tests for "AppSandboxFileAccessOpenSavePanelDelegate" class.

CocoaPods support:

• Added LICENSE and CocoaPods ".podspec" files.

Note: The CocoaPods integration still requires some steps from you:

1. Add a tag 1.0.14 for the PR merge commit.
2. Run $ pod spec lint AppSandboxFileAccess.podspec in your project directory.
3. Run `$ pod trunk push in your project directory.

[vslavik]

@regexident I’m not Leigh (obviously), but wanted to chime in with a thank you — these are nice, well-written improvements that I’m going to merge into my fork real soon.

[leighmcculloch]

@regexident This PR is great, and really improves the code! Could you comment on the two things I raised (I want to make sure I'm not missing something)? I'll then merge it manually into the develop branch.

I've got a branch on-top of your current changes that fixes the stale bookmark issue. :smile:

[regexident]

Hi Leigh,

the two comments of yours are 100% legitimate.

And thanks for the project in the first place! :+1:

[leighmcculloch]

Merged.