Update to latest version of xproc-maven-plugin
xprocspec tested as an integration test

also fixed issue with x:import not working when tests are stored in different directories
Merge branch 'master' into xproc-maven-plugin

Conflicts:
	www/documentation/test-results.html.html
	www/documentation/test-results.junit.xml
	www/documentation/test-results.result.xml
moved tests to integration test project
Merge pull request #8 from daisy-consortium/xproc-maven-plugin

Update to latest version of xproc-maven-plugin