Key changes:.

• Changed SDK libraries folder layout for more readable names.
• Implemented correct multiple surface creation on android platform.
• Fixed crash on exit in JDFont.
• Added PathFinder to base/math (probably temporary location) with deijkstra and A* search algorithms.
• Float16 implementation moved to header.
• Fixed bug in sort function.
• Added lazy_string.
• Added Run, SetCurrentFolder, GetCurrentFolder, GetApplicationPath to Application class.
• Other small improvements and fixes.