Bug fixes (network requests continue on background threads, CMISDateUtil was not thread safe, title element not XML escaped), code tidy and fixed typos.
Build also now produces a debug and release static library (release build no longer contains debug symbols).

git-svn-id: https://svn.apache.org/repos/asf/chemistry/objectivecmis/trunk@1575945 13f79535-47bb-0310-9956-ffa450edef68