Adding SPM integration - need to fix carthage support

.gitignore

@@ -1,15 +1,14 @@
-# OS X
-.DS_Store
+## OSX
+*.DS_Store
+
+# Xcode Include to support Carthage for the Foundation project.
+*.xcodeproj
+*.xcworkspace
 
 # Xcode
 #
-# gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore
-
-## Build generated
 build/
-DerivedData/
-
-## Various settings
+Build/
 *.pbxuser
 !default.pbxuser
 *.mode1v3
@@ -18,52 +17,25 @@ DerivedData/
 !default.mode2v3
 *.perspectivev3
 !default.perspectivev3
-xcuserdata/
-
-## Other
-*.moved-aside
+xcuserdata
 *.xccheckout
-*.xcscmblueprint
-
-## Obj-C/Swift specific
+*.moved-aside
+DerivedData
 *.hmap
 *.ipa
-*.dSYM.zip
-*.dSYM
+*.xcuserstate
 
-## 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
-#
-# We recommend against adding the Pods directory to your .gitignore. However
-# you should judge for yourself, the pros and cons are mentioned at:
-# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
-#
-Pods/
-
-# Carthage
-#
+Pods
 Carthage/Checkouts
-
 Carthage/Build
+.idea
+Podfile.lock
 
-# fastlane
+# Swift Package Manager
 #
-# 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
+# Add this line if you want to avoid checking in source code from Swift Package Manager dependencies.
+Packages/
+Package.pins
+Package.resolved
+.build/

Cartfile

@@ -1,2 +1,3 @@
-github "ReactiveX/RxSwift" ~> 4.5
-github "RxSwiftCommunity/RxOptional" ~> 3.1.3
+github "ReactiveX/RxSwift" ~> 4.5.0
+github "RxSwiftCommunity/RxOptional" ~> 3.1.3
+github "uber/RxCBCentral" ~> 1.0

Cartfile.resolved

@@ -1,2 +1,3 @@
 github "ReactiveX/RxSwift" "4.5.0"
 github "RxSwiftCommunity/RxOptional" "3.7.0"
+github "uber/RxCBCentral" "v1.0.0"