Correctly retrieve `sbt.version` from pom.xml.

This should fix failures like [1508](https://scala-webapps.epfl.ch/jenkins/view/pr-validators/job/pr-scala-integrate-ide/1508/consoleFull)
Merge pull request #20 from dragos/fix/ide-sbt-version-failures

Correctly retrieve ${sbt.version} from pom.xml
Integrate against partest v1.0-RC4

TODO: propagate versions.properties and parse partest version from there, derive tag
update artifactory URL to private-repo.typesafe.com
Merge pull request #21 from huitseeker/update-artifactory

Updates artifactory URL to private-repo.typesafe.com
partest.task doesn't work with the plugin enabled

don't have time to figure out what's wrong, so I'll just move it to
the no-plugin section of the build
Merge pull request #22 from xeno-by/master

partest.task doesn't work with the plugin enabled
Fix typo: s/tyepsafe/typesafe/
Switch to dbuild for Sbt artifacts.

* Once this is merged, we can remove the *sbt-legacy* profile in scala-ide
build for the spores plugin
Merge pull request #25 from xeno-by/master

build for the spores plugin
Reviewer's comments.

* no more grepping for the Sbt version inside pom.xml
* made `dbuild` URL/branch configurable
* removed some duplication around Scala version strings
* added a few comments.
Merge pull request #24 from dragos/validation/dbuild

Switch to dbuild for Sbt artifacts.
export maven opts
2.10.2 build of paradise
Merge pull request #26 from xeno-by/master

2.10.2 build of paradise
updates paradise test_fixup for the recently merged phases pull request
Merge pull request #27 from xeno-by/master

updates paradise test_fixup for the recently merged phases pull request
updates paradise test_fixup
Merge pull request #28 from xeno-by/master

updates paradise test_fixup