Added an option to bundle LZ4 support.
Added an option to bundle LZ4 support.

 - running with -PbuildWithLZ4Support will include LZ4 in the hadoop jar
danielbwatson/aegisthus,Netflix/aegisthus,danielbwatson/aegisthus,coursera/aegisthus,Netflix/aegisthus,Tubular/aegisthus,Tubular/aegisthus,tracymkgld/aegisthus,tracymkgld/aegisthus,coursera/aegisthus,Tubular/aegisthus