Tag 3.1.0

Includes:
• Swift 2.2 support
• UIImagePickerController category improvements
• Array overloads for `join` and `race`
• Fix for an import issue when using Obj-C++

Author: nathanhosselton

PromiseKit.xcodeproj/project.pbxproj

@@ -2094,7 +2094,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 3.0.3;
+				CURRENT_PROJECT_VERSION = 3.1.0;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
@@ -2149,7 +2149,7 @@
 				CLANG_WARN_UNREACHABLE_CODE = YES;
 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
 				COPY_PHASE_STRIP = NO;
-				CURRENT_PROJECT_VERSION = 3.0.3;
+				CURRENT_PROJECT_VERSION = 3.1.0;
 				DYLIB_COMPATIBILITY_VERSION = 1;
 				DYLIB_CURRENT_VERSION = 1;
 				ENABLE_NS_ASSERTIONS = NO;