Bumped version to 3.8.2

+## [3.8.2 Patch release for 3.8.0 on Sep 5th, 2016](https://github.com/rs/SDWebImage/releases/tag/3.8.2)
+
+#### Fixes:
+
+- Fixed #1608 #1623 #1644 Crash in `[NSURLCache cachedResponseForRequest:]` -  the fix is actually avoiding to access `NSURLCache` which appears to generate a race condition. We only call it if necesarry (`SDWebImageRefreshCached` is used and the image cannot be cached by the system when it's too big or behind authentication)
+
 ## [3.8.1 Patch release for 3.8.0 on Jun 7th, 2016](https://github.com/rs/SDWebImage/releases/tag/3.8.1)
 
 #### Fixes:

 Pod::Spec.new do |s|
   s.name = 'SDWebImage'
-  s.version = '3.8.1'
+  s.version = '3.8.2'
   s.ios.deployment_target = '7.0'
   s.tvos.deployment_target = '9.0'
   s.license = 'MIT'

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>3.8.1</string>
+	<string>3.8.2</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>