Added android screen activation

Added android screen activation
    devtools.sh
Changed relative path to appease gitbucket

   README.md
Fixed code standard issues

Fixed code standard issues
Added external libnoise library

Added external libnoise library

Updated README.md
    README.md

Updated init script for adding android symlinks
    initialize_project.sh

Entry header file to external library
    src/util/Noise.h (+)

The libnoise library
    external/noise/* (+)

Updated build related files
    SConstruct
    common_build.py
    src/Android.mk
Minor fixes to external/flite build

Minor fixes to external/flite build

Added the various static libraries to SCons default build
so that they are cleaned up after.

    external/flite/lang/SConscript
    external/flite/main/SConscript
    external/flite/src/SConscript
Updated directory tree to include external/noise

Updated directory tree to include external/noise
    README.md
Added external PolyVox library

Added external PolyVox library

Updated README.md
    README.md

Updated init script adding android symlinks
    initialize_project.sh

The PolyVox library
    external/polyvox/*                     (+)
    external/polyvox/library/Android.mk    (+)
    external/polyvox/library/PolyVoxCore/* (+)
    external/polyvox/library/PolyVoxUtil/* (+)
    external/polyvox/sdl2-cross-changes.md (+)

Updated build related files
    SConstruct
    common_build.py
    src/Android.mk