Adds atom_boolean.
Adds EvalContext for sexpr evaluation.
Updates to handle an atom as a function.
Version 0.2.5 (20140228)
Version 1.0.0 (20140204)
- Scala 2.10.3 version
Merge branch 'scala210' of github.com:asami/goldenport-sexpr into scala210

Conflicts:
	build.sbt
	src/main/scala/org/goldenport/sexpr/eval/Evaluator.scala
	src/main/scala/org/goldenport/sexpr/eval/SExprParsers.scala
Version 1.0.1 (20140304)