support unicode in binary plists
build wide char overloads of std::fstream under MSVC only
update pugixml to 2.0
add boost missing headers + update to version 1.55.0
reduce the public interface and header dependencies, and move most functions to implementation files
remove some unnecessary string copies
convert thrown exceptions from runtime_error to Plist::Error
fix xml conversion of large integers
fix a name clash with a macro under Android
definition of plist value types
whitespace cleanup
replace uses of math functions with efficient integer code
Merge pull request #6 from martinez/master

Unicode strings + fixing the build under linux gcc 4.8