Squashed 'src/ios/GCDWebServer/' changes from d1e2a1a..15caa9c

15caa9c Fix
32ba49a Removed MRC support entirely
8b87924 Bumped version
5bda05c Update README.md
a8481af Update README.md
b5ad507 Update README.md
8c8e484 Fix
514c09d Added truly asynchronous support to GCDWebServerStreamedResponse
c4bf7b1 Added support for asynchronous reading in GCDWebServerBodyReader
a933b21 Fix
001df4e Fix
75d018a #85 Added support for IPv6
4449e42 Update README.md
c45053b Added support for third-party logging facilities
5070e4f Update README.md
7c1e70a Added XLFacilityLogging.h
7102c79 Fix
2de9418 Enabled ENABLE_STRICT_OBJC_MSGSEND
e59cf4b Bumped version
9e8f0e0 Updated iOS app for iOS 8 SDK
d7650a7 Lowered deployment targets
420ddc3 Replaced preprocessor constant "NDEBUG" by the more standard "DEBUG" one and flipped behavior accordingly
143e38c Added README and podspec files to Xcode project for convenience
8e9fe4c Update README.md
95bccff Fix
780a608 Update README.md
18d93bb Bumped version
b35ebd7 #92 Added support for async handlers
a11b047 Renamed GCDWebServerStreamingBlock to GCDWebServerStreamBlock
4eac9d4 Upgrade to Xcode 6.1

git-subtree-dir: src/ios/GCDWebServer
git-subtree-split: 15caa9cd20ed6b32bd69704a90261efe1ca71b77
Merge commit '87a2b43bb73caee36a64ebd36d1afa226cb230fb'