Fixed hard-coding of FLEX_HOME in the ant build.  Now it relies on the FLEX_HOME environment variable and doesn't require modification to run on different systems.
Fixed up indentation for consistency with original code.
Updated readme for FLEX_HOME change.
Merge branch 'better_use_of_flex_home' of https://github.com/dbb613/openvv into dbb613-better_use_of_flex_home
Merge branch 'dbb613-better_use_of_flex_home'