create example files from code extracted from scaladoc for new tags
Removed 'a' method in Matchers that is not used.
Merge branch 'jira-155' of https://github.com/gcberger/scalatest
Added tests and implemented implicits in ConfigMap companion object for Containing, Aggregating, KeyMapping, and ValueMapping.
Added exist matcher support, using Existence type calss.
Added readable matcher support, using Readability type class.
Added writable matcher support, using Writability type class.
Initial work to make enabler type classes contravariant.
Deleted commented-out code that is no longer needed because of the contravariance.
Fixed names of implicit producers in Sortable companion object.
Made Sequencing contravariant.
Maded Sortable contravariant. Wrote a test for Collecting, but it
already passed so didn't change variance of Collecting.
Merge branch 'existence' of https://github.com/cheeseng/scalatest
Merging in Chee Seng's readability and writability enhancements with conflicts fixed.

Conflicts:
	project/GenFactories.scala
	src/main/resources/org/scalatest/ScalaTestBundle.properties
	src/main/scala/org/scalatest/matchers/Matcher.scala
	src/main/scala/org/scalatest/words/MatcherWords.scala
Updated version to 2.0.M6-SNAP28 and improved Scaladoc for ant task.
Changed org.scalatest.tools.Framework:
- To automatically skip suite if it is not accessible and is not explicitly specified
- Throw IllegalArgumentException when -g is passed in
Changed groupId of test-interface artifact to org.scala-sbt and version to 1.0 in pom_template.xml.
Fixed broken sbt build, upgraded to to sbt 0.13.0-RC1.
Fixed broken test in LocationFunctionSuiteProp.
Fixed -l (exclude tag) problem in Framework.