Added initial version of 'isInstanceOf' macro support.
Bumped version to 2.1.0.
Fixed broken sbt build file.
Added support of length and size to Bool and BooleanMacro.
init ver.
Added ScalaUtils in the title.
Improve markdown.
Enhanced error message for macro to include 'key' word when used with GenMap.contains.
Added support of exists to Bool and BooleanMacro.
Merge branch 'sbt-build-fix' of https://github.com/cheeseng/scalatest
Merge pull request #257 from cheeseng/sbt-build-fix

SBT Build Fix
Merge branch 'master' of https://github.com/scalatest/scalatest
Merge branch 'isInstanceOf-macro' of https://github.com/cheeseng/scalatest
Merge branch '2.1.x' of https://github.com/scalatest/scalatest