create iOS download without symbols

[incanus]

Not everyone is used to a large static library (300MB+ currently) which includes symbols, since most frameworks aren't open source.

#1234, #1633

We should push dual downloads of each release, one as we do currently and one with debug symbols stripped. Maybe something like:

• mapbox-gl-ios-X.Y.Z.zip
• mapbox-gl-ios-symbols-X.Y.Z.zip

It's still the Release build configuration both ways.

[incanus]

Needs some testing, but mostly followed the above scheme — two different release products:

• mapbox-gl-ios-X.Y.Z.zip
• mapbox-gl-ios-X.Y.Z-symbols.zip

[incanus]

Latest sizes:

• Unstripped, device & sim: 397.1MB
• Unstripped, sim only: 161.7MB
• Stripped, device & sim: 20MB

Big improvement there. I think that means that we increase the size of apps by 20MB, though, in the best case, but need to confirm.

[incanus]

• Basic Objective-C app from Xcode template: 28KB .ipa
• Same app with unstripped GL integrated showing map view: 1.1MB .ipa
• Same app with stripped GL integrated and showing map view: 1.1MB .ipa

So, significant increase but totally acceptable in both cases considering OTA apps are limited to 100MB. The end app strips during its archive process.

Really this comes down to the question of whether we make the download/install process easier for devs or not, since the end app won't bloat if we leave symbols in.

Either way, we should document this fact so people know what to expect in their app sizes.

[incanus]

Publish process releases two packages per #1650 (comment) and we'll add both to GitHub releases, which gets linked from the binary install process directly.

[incanus]

Note that we'll have to do stuff like 7bef7b3 in order to use symbols-laden builds for internal testing apps.

$ pod update
Update all pods
Analyzing dependencies
Fetching podspec for `MapboxGL` from `https://raw.githubusercontent.com/mapbox/mapbox-gl-native/release-v0.4.0/ios/MapboxGL.podspec`
Downloading dependencies
Installing MapboxGL 0.4.0-rc.1-symbols (was 0.3.5)
Generating Pods project
Integrating client project