Repo restructure (#203)

* Created Example folder for both Objective-C and Swift demo projects.
* Example projects now use Cocoapods instead of direct local imports.
   - This shows a better example of how it will be used with a real project.
* Created a OneSignalDevApp as a test project for SDK development
   - Includes a workspace with this new project along with the SDK.
   - Ensure your testing with the latest SDK code changes.
   - Makes setting breakpoints easier.
* Moved all SDK source files into a Source folder with a single level depth.
   - Files were inconsistently in nested folders.
   - Keep files at single level in this folder, use Xcode to create nesting.

Author: jkasten2

.gitignore

@@ -9,6 +9,7 @@ build/
 *.perspectivev3
 !default.perspectivev3
 *.xcworkspace
+!OneSignalSDK.xcworkspace
 !default.xcworkspace
 xcuserdata
 profile

.travis.yml

@@ -1,7 +1,7 @@
 language: objective-c
 osx_image: xcode8.1
 before_install:
-  - cd iOS_SDK
+  - cd iOS_SDK/OneSignalSDK
 script:
   - xcodebuild -list
   - xcodebuild build -scheme OneSignal-Dynamic

Examples/.gitignore

@@ -0,0 +1,2 @@
+Pods
+Podfile.lock