support range of version numbers for scala dependencies in pom.xml

Created new property scala.version.range in build.xml and set it to
[2.10.0, 2.10.99].  New property gets used for setting <version>
value of scala-compiler and scala-library dependencies in pom.

Tried to use range [2.10.0, 2.11), but that caused scalatest to get
compiled with 2.11.  Suspect due to a bug in maven ant tools.

Tried to just change scala.version to new range value, but that caused
osgi to fail, so created new property scala.version.range instead.

Deployed this commit as SNAP36.
Merge branch 'scala-version-range' of https://github.com/gcberger/scalatest