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
Added Snapshots.
Make fallback error message for .exists to include source code.
Added missing scaladoc in Requirements.scala.
Fixed scaladoc typo in Snapshots.scala.
Merge branch 'captured-macro' of https://github.com/cheeseng/scalatest
Use SnapshotSeq to get better toString, and also added lines method.