fix LZMA/bootimage build

This includes some tweaks to README.md and makefile to ensure the
directions in the former for building a bootimage actually work.
Merge pull request #313 from dicej/lzma-bootimage

fix LZMA/bootimage build
Add linux[32,64] and windows[32,64] support
Add all platform/arch configurations to artifactory publishable set
Publish javadoc jar and classpath jar to main avian coordinates
Configure javadoc a bit
Remove github pages javadoc publish (we now have the ability to publish javadoc jar)
Remove commented builtBys
Fix up encrypted travis.yml data
Remove clean before publish
Add dependency between artifactoryPublish and assemble
fix lzma build with clang

Clang doesn't like seeing -std=c++0x when building C code, and many of
the options in cflags don't apply to the LZMA source code anyway, so
we give LZMA its own set of compiler flags.
Merge pull request #315 from dicej/lzma-clang

fix lzma build with clang
Merge pull request #314 from sgoings/master

Avian UX Upgrade: Artifact Publishing v2
Fixed Android build on Windows
Fixing Avian classpath on Windows
Merge pull request #316 from bigfatbrowncat/fixing-windows-build

Fixed Android build on Windows