Added podspec and license

EGOCache.podspec

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+Pod::Spec.new do |s|
+  s.name         = "EGOCache"
+  s.version      = "2.1"
+  s.summary      = "Fast Caching for Objective-C (iPhone & Mac Compatible)."
+  s.description  = "EGOCache is a simple, thread-safe key value cache store. It has native support for NSString, UI/NSImage, and NSData, but can store anything that implements <NSCoding>. All cached items expire after the timeout, which by default, is one day."
+  s.homepage     = "https://github.com/enormego/EGOCache"
+  s.license      = "MIT"
+  s.author       = "Enormego, Shaun Harrison"
+  s.source       = { :git => "https://github.com/enormego/EGOCache.git", :tag => "v" + s.version.to_s }
+  s.requires_arc = true
+  s.source_files = "*.{h,m}"
+end

LICENSE

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+Copyright (c) 2014 Enormego
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.