Bind a session to the quartz thread

Init the PersistenceContextInterceptor at the start of the job so that
the behavior inside the thread is the same as in Grails requests and
we don't keep opening and closing sessions (and having the session
objects become unattached) all the time.
Adapt to security checks in transmartApp

transmartApp now needs to be able to get the "current user" at several
points. This is done by injecting the bean name "currentUserBean".
This bean is of type CurrentUserBeanFactoryBean, which returns a proxy
that tries to find several beans in order (with each one in a
different Spring scope). In RModules, we introduce a new scope, "job".
This scope is active inside Quartz threads whose entry point is
AnalysisQuartzJobAdapter::execute().

Because we 1) unfortunately, and perhaps unnecessarily, happen to call
some transmartApp services that end up using currentUserBean and 2) we
now implement an access check in Rmodules itself, we need to provide a
way to retrieve the current user (for 2) through the currentUserBean
mechanism (for 1).

This is done by, in the doWithApplicationContext hook, retrieving the
currentUserBean factory reference and registering a new bean to try.
The bean we are registering is job scoped.
Improve .travis.yml
Use hyve's repos
Change app.name to match plugin name
Merge pull request #91 from thehyve/rid_check

Check ownership of result instance ids
Updated theme_text function (deprecated since ggplot2 0.9.1) to element_text
Merge pull request #93 from thehyve/bugs/update-deprecated-R-function-call

Updated theme_text function (deprecated since ggplot2 0.9.1) to element_...