Merge pull request gecko0307#39 from buggins/master

Fix jpeg.d warnings; fix compilation under 64 bit

Updated README.md

Improved Quaternion axis/angle conversion

Fixed compilation under Windows

Made Dual methods const

Fixed gecko0307#17: changed BMP loader to use streams

Fixed gecko0307#17: changed BMP loader to use streams

Added package.d for dlib.xml

Added implicit vector conversion

Fixed some 64-bit issues