Zip geocoding data for framework 4.6+

[dwfrancis]

Compress geocoding data to reduce dll size to 4608 KB from 14 311 KB for .NET 4.6, .NET Standard 1.3 and .NET Standard 2.0 builds.

[codecov-commenter]

Codecov Report

Merging #147 (9ac7e8d) into main (4f71b80) will increase coverage by 0.02%. The diff coverage is 89.58%.

@@            Coverage Diff             @@
##             main     #147      +/-   ##
==========================================
+ Coverage   87.60%   87.62%   +0.02%     
==========================================
  Files          25       25              
  Lines        3194     3233      +39     
  Branches      747      754       +7     
==========================================
+ Hits         2798     2833      +35     
- Misses        229      232       +3     
- Partials      167      168       +1     

Impacted Files	Coverage Δ
csharp/PhoneNumbers/PhoneNumberOfflineGeocoder.cs	81.50% <89.58%> (+2.06%)	:arrow_up:
csharp/PhoneNumbers/PhoneNumberUtil.cs	84.89% <0.00%> (+0.08%)	:arrow_up:

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[dwfrancis]

The new tests for zipped geocoding fail on the appveyor build but pass locally. I've decompiled the artifact - the preprocessor directives don't seem to be applied.

Could it be an issue using FRAMEWORK_OR_GREATER

I can hold off on this PR until the net35 removal is done. That should simplify the preprocessor directives to just be !PORTABLE

[dwfrancis]

The issue was {FRAMEWORK}_OR_GREATER - all looks good now.

[dwfrancis]

Fixes large dll sizes - see issue #98

[dwfrancis]

@twcclegg any update on this? Zipping the metadata will significantly reduce the DLL sized needed for offline geocoding.

[JulianPasque]

Any plan on merging this PR? @twcclegg

[patrikwlund]

Would love to see this merged! 🙌

Ping @twcclegg

[twcclegg]

Sorry I've neglected this. I think once this is rebased I can merge it. Things relating to portable or net framework an be removed.