Issue #142: Updating CocoaPods
Merge remote-tracking branch 'origin/develop'

Conflicts:
	Simperium.podspec
Sets version to v0.6.4
Updates Simperium.podspec
SPMemberJSON: Nukes comments
SPPersistentMutableDictionary: updates variable names
SPSchema: Nukes static helper
Fixes comment typo
SPWebSocketChannel: Adds autoreleasepool comments
Issue #214: Nukes old authentication methods
Merge pull request #245 from Simperium/v0.6.4

Merges Simperium v0.6.4 Branch
Issue #287: Fixes reachability in OSX
Issue #289: Updates SPReachability logic
Issue #270: Make email validation less strict
Issue #284: Adds needsAuthentication getter
Issue #261: Implement support for Replacement Operations
Implements SPChangeProcessor Unit Test
Minor code style update
Adds extra failsafe
Minor code style update (Part II)