Clean up some old histogram and generator code, and added support for
normal, beta, and reflected beta distributions.
Merge branch 'master' of
https://github.com/janakihere/automated-data-generator.git

Conflicts:
	automated-data-generator/src/test/java/com/galatea/generatea/generators/ListSelectionDataGeneratorTest.java
	automated-data-generator/src/test/java/com/galatea/generatea/generators/StringGeneratorTest.java