Various updates

[Norod]

Hello

Your library is awesome. I had a separate branch forked out of yours for a while. Merging in your recent commit (UIImage/NSImage + Cache), I got a lot of conflicts as we both addressed the same image memory issues :) So, I decided to take your most recent branch and apply my code updates to it (to have a small number of commits) and make this PR. I hope you find it (or parts of it) useful.

Change list:

• Updated .gitignore to include possible output of latest assimp build (including dynamic library for the macOS target)
• Added the example projects to the workspace
• Using CGImageRef directly for both iOS and Mac targets, rather than creating UIImage / NSImage wrapper for each platform
• Test targets no longer require to be familiar directly with assimp
• Silly typo-crash fixed when MY_DEBUG was set and a call to DLog(@" N VERTICES: %@", @(nVertices)); was made
• Importer'saiFace->mNumIndices != 3 edge case error fix
• SCNTextureInfo - Managing _image, _color and _colorSpace memory manually
• SCNTextureInfo - Sorted out some embedded textures / colour glitches I encountered
• SCNTextureInfo - Sorted out construction and assignment of externalTexturePath
• SCNTextureInfo - Added sanity assertions
• SCNTextureInfo- Simplified embedded texture creation and memory footprint
• Automatically load first animation when loading the model
• Allow model export to .scn / .dae / .obj
• use fileURLWithPath
• All targets pass Static analyser with no "blue" issues
• Pass both xctests
• (Tested separately works well with assimp v4.1 with BitCode for assimp, dynamic library for assimp on macOS)

Regards, Doron Adler

[codecov-io]

Codecov Report

Merging #108 into master will increase coverage by 0.3%. The diff coverage is 94%.

@@            Coverage Diff            @@
##           master     #108     +/-   ##
=========================================
+ Coverage   74.76%   75.06%   +0.3%     
=========================================
  Files          17       17             
  Lines        1565     1596     +31     
=========================================
+ Hits         1170     1198     +28     
- Misses        395      398      +3

Impacted Files	Coverage Δ
AssimpKit/Code/Model/Tests/AssimpImporterTests.m	64.5% <100%> (-0.17%)	:arrow_down:
AssimpKit/Code/Model/AssimpImageCache.m	81.81% <71.42%> (-18.19%)	:arrow_down:
AssimpKit/Code/Model/AssimpImporter.m	89.08% <93.33%> (-0.02%)	:arrow_down:
AssimpKit/Code/Model/SCNTextureInfo.m	97.22% <95.71%> (+0.47%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 45dbbb7...8d6df57. Read the comment docs.

[dmsurti]

@Norod Thanks for these contributions, extremely useful.

Any chance, you can give a shot to resolve the conflicts? Otherwise I will give it a dash in the weekend post Sep 20.

Sincerely apologize for the delay, work took priority!

Thanks again.