Added support for integration via Carthage and/or Workspace

.gitignore

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+
+# Created by https://www.gitignore.io/api/swift
+
+### Swift ###
+# Xcode
+#
+# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
+
+## Build generated
+build/
+DerivedData/
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+
+## Other
+*.moved-aside
+*.xccheckout
+*.xcscmblueprint
+
+## Obj-C/Swift specific
+*.hmap
+*.ipa
+*.dSYM.zip
+*.dSYM
+
+## Playgrounds
+timeline.xctimeline
+playground.xcworkspace
+
+# Swift Package Manager
+#
+# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
+# Packages/
+# Package.pins
+.build/
+
+# CocoaPods - Refactored to standalone file
+
+# Carthage - Refactored to standalone file
+
+# fastlane
+#
+# It is recommended to not store the screenshots in the git repo. Instead, use fastlane to re-generate the
+# screenshots whenever they are needed.
+# For more information about the recommended setup visit:
+# https://docs.fastlane.tools/best-practices/source-control/#source-control
+
+fastlane/report.xml
+fastlane/Preview.html
+fastlane/screenshots
+fastlane/test_output
+
+
+# End of https://www.gitignore.io/api/swift
+
+# Created by https://www.gitignore.io/api/cocoapods
+
+### CocoaPods ###
+## CocoaPods GitIgnore Template
+
+# CocoaPods - Only use to conserve bandwidth / Save time on Pushing
+#           - Also handy if you have a large number of dependant pods
+#           - AS PER https://guides.cocoapods.org/using/using-cocoapods.html NEVER IGNORE THE LOCK FILE
+Pods/
+
+
+# End of https://www.gitignore.io/api/cocoapods
+
+# Created by https://www.gitignore.io/api/carthage
+
+### Carthage ###
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+Carthage/Checkouts
+Carthage/Build
+Cartfile.resolved
+
+
+# End of https://www.gitignore.io/api/carthage
+
+# Created by https://www.gitignore.io/api/osx
+
+### OSX ###
+*.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+
+# End of https://www.gitignore.io/api/osx

Cartfile

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+github "mattt/Surge" ~> 2.0.0

HCKalmanFilter Sample/HCKalmanFilter Sample.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

HCKalmanFilter.xcodeproj/Configs/Universal.xcconfig

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+PRODUCT_NAME = $(TARGET_NAME)
+DYLIB_INSTALL_NAME_BASE = @rpath
+OTHER_SWIFT_FLAGS = -DXcode
+APPLICATION_EXTENSION_API_ONLY = YES
+
+VALID_ARCHS[sdk=iphoneos*] = arm64 armv7 armv7s
+IPHONEOS_DEPLOYMENT_TARGET = 8.0
+LD_RUNPATH_SEARCH_PATHS[sdk=iphone*] = $(inherited) @executable_path/Frameworks @loader_path/Frameworks
+
+TVOS_DEPLOYMENT_TARGET = 10.0
+LD_RUNPATH_SEARCH_PATHS[sdk=appletv*] = $(inherited) @executable_path/Frameworks @loader_path/Frameworks
+
+WATCHOS_DEPLOYMENT_TARGET = 3.0
+LD_RUNPATH_SEARCH_PATHS[sdk=watch*] = $(inherited) @executable_path/Frameworks @loader_path/Frameworks
+VALID_ARCHS[sdk=watchos*] = armv7k
+
+VALID_ARCHS[sdk=macosx*] = x86_64
+MACOSX_DEPLOYMENT_TARGET = 10.7
+LD_RUNPATH_SEARCH_PATHS[sdk=macosx*] = $(inherited) @executable_path/../Frameworks @loader_path/../Frameworks
+
+TARGETED_DEVICE_FAMILY = 1,2,3,4
+SUPPORTED_PLATFORMS = watchsimulator watchos macosx iphoneos iphonesimulator appletvos appletvossimulator