Collection view's reload data has been changed to reload sections

Fix carthage directions in readme

ISSUE_TEMPLATE.md

@@ -1,14 +1,13 @@
-**Please copy the following template [here](https://github.com/ReactiveX/RxSwift/issues/new) and fill in the missing fields so we can help you as soon as possible.**
 
-**If you don't have something to report in the following format, it will probably be easier and faster to ask in the [slack channel](http://http://slack.rxswift.org/) first.**
+:warning: If you don't have something to report in the following format, it will probably be easier and faster to ask in the [slack channel](http://http://slack.rxswift.org/) first. :warning: 
 
-```
-*Short description*:
+**Short description of the issue**:
 
-  description here
+  _description here_
 
-*Self contained code example that reproduces the issue*:
+**Self contained code example that reproduces the issue**:
 
+```swift
   code goes here
   
 // If we can't get a self contained code example that reproduces the issue, there is a big chance we won't be able
@@ -16,36 +15,37 @@
 // `Self contained code example` means:
 // * that we should be able to just run the provided code without changing it.
 // * that it will reproduce the issue upon running
+```
 
-*Xcode version*:
+**Xcode version**:
 
+```
   Xcode version goes here
+```
 
-*Expected outcome*:
+**Expected outcome**:
 
-  what you expect to happen goes here
+  _what you expect to happen goes here_
 
-*What actually happens*:
+**What actually happens**:
 
-  what actually happens goes here
+  _what actually happens goes here_
 
-// filling in additional information below is optional, but resolving your issue could potentially be a lot faster
+:warning: Fields below are optional for general issues or in case those questions aren't related to your issue, but filling them out will increase the chances of getting your issue resolved. :warning:
 
-*Installation method*:
-  (so we don't waste time investigating an incorrect integration)
-  * CocoaPods
-  * Carthage
-  * Git submodules
+**Installation method**:
+  - [ ] CocoaPods
+  - [ ] Carthage
+  - [ ] Git submodules
 
-*I have multiple versions of Xcode installed*:
+**I have multiple versions of Xcode installed**:
   (so we can know if this is a potential cause of your issue)
-  * yes (which ones)
-  * no
+  - [ ] yes (which ones)
+  - [ ] no
 
-*Level of RxSwift knowledge*:
+**Level of RxSwift knowledge**:
   (this is so we can understand your level of knowledge
     and formulate the response in an appropriate manner)
-  * just starting
-  * I have a small code base
-  * I have a significant code base
-```
+  - [ ] just starting
+  - [ ] I have a small code base
+  - [ ] I have a significant code base

README.md

@@ -5,6 +5,10 @@
 
 ## About Rx
 
+**:warning: This readme describes RxSwift 3.0 version that requires Swift 3.0:warning:**
+
+**:warning: If you are looking for Swift 2.3 compatible version, please take a look at RxSwift ~> 2.0 versions and [swift-2.3](https://github.com/ReactiveX/RxSwift/tree/rxswift-2.0) branch :warning:**
+
 Rx is a [generic abstraction of computation](https://youtu.be/looJcaeboBY) expressed through `Observable<Element>` interface.
 
 This is a Swift version of [Rx](https://github.com/Reactive-Extensions/Rx.NET).
@@ -168,7 +172,7 @@ $ pod install
 Add this to `Cartfile`
 
 ```
-github "ReactiveX/RxSwift" ~> 3.0.0.alpha.1
+github "ReactiveX/RxSwift" "3.0.0.alpha.1"
 ```
 
 ```

RxCocoa/iOS/DataSources/RxCollectionViewReactiveArrayDataSource.swift

@@ -101,7 +101,7 @@ class RxCollectionViewReactiveArrayDataSource<Element>
     func collectionView(_ collectionView: UICollectionView, observedElements: [Element]) {
         self.itemModels = observedElements
         
-        collectionView.reloadData()
+        collectionView.reloadSections(NSIndexSet(index: 0))
     }
 }