PIG-3867 Added hadoop home to build classpath for build pig with unit test on windows


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1593445 13f79535-47bb-0310-9956-ffa450edef68
 PIG-3901: Organize the Pig properties file and document all properties (mrflip via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1593478 13f79535-47bb-0310-9956-ffa450edef68
PIG-3922: Increase Forrest heap size to avoid OutOfMemoryError building docs (mrflip via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1593479 13f79535-47bb-0310-9956-ffa450edef68
PIG-3923: Gitignore file should ignore all generated artifacts (mrflip via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1593480 13f79535-47bb-0310-9956-ffa450edef68
PIG-3921: Obsolete entries in piggybank javadoc build script (mrflip via cheolsoo)


git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1593483 13f79535-47bb-0310-9956-ffa450edef68