Merge pull request #5 from indragiek/master

Fix NSXMLParserError due to improper string escaping
Add a test case and fix the bug by adding missing XML escapes
Add unit tests for <a href> escaping
Fix podspec to not use FileList and bump to 0.1.5
Fix sub and superscript on AppKit
Mark schemes as shared to enable Bot integration on<redacted>.
Merge branch 'master' of github.com:IdeasOnCanvas/Ashton
Fix warning
Fix warning about example window
Fix analyzer warnings
Support baseline shift AppKit, preserve it on UIKit and CoreText
Updated test rtf with Baseline and Subscripting sample.
Support bigger range of superscript while preserving CSS default support for only -1, 0 and +1
Use integerValue everywhere in case Apple mucks with NSInteger in the future
Bump iOS deployment target to 6.1
Bump Ashton version