adding support for very deep trees
Parameterizing max memory.
Merge pull request #5 from etrain/deep_tree

Parameterizing max memory.
minor: added doc for maxMemory parameter
Fixing scalastyle issue.
Merge pull request #6 from etrain/deep_tree

Fixing scalastyle issue.
updating user documentation
merge from master
updated documentation
added unit test
renamed parameter
removed unused imports
modified scala.math to math
added documentation, fixed off by 1 error in max level calculation
formatting
grammar
more formatting
programming guide blurb
formatting
minor formatting