Workaround sbt/sbt#647; Update escalante to 0.2.0; Fix for #9

-  The workaround for sbt/sbt#647 posted in [the Lift forum](https://groups.google.com/forum/?fromgroups=#!topic/liftweb/H-WR48BojSc) did not work for me (see the second error mesage in [this](https://groups.google.com/d/msg/liftweb/H-WR48BojSc/gL7QcEN0r48J) post), however explicitly adding a dependency on `"org.jboss.shrinkwrap.descriptors" % "shrinkwrap-descriptors-spi" % "2.0.0-alpha-3"` instead of allowing the version to be resolved transitively seems to work.

-  Escalante dependency updated to 0.2.0 as 0.2.0-SNAPSHOT no longer available and causing dependency resolution errors.

- Fix for #9 (missing path separator in `jbossHome` value)