IdentityLink null-check

Required when custom identity links are used.
SubProcess ENTITY_CREATED fix
remove @Test annotation from JUnit3 based tests
Merge pull request #8 from Activiti/master

Merge branch 'master' of https://github.com/Activiti/Activiti
ReflectUtil.loadClass() and custom classloader
Update userguide to reflect new way of disabling demo data

via engine.properties rather than activiti-standalone-context.xml
Merge remote-tracking branch 'Activiti/master'
Adding model source and source-extra urls to model response
removeValidator signature fix
Merge pull request #422 from mikedias/patch-2

removeValidator signature fix
Merge pull request #418 from bruceharris/patch-1

Update userguide to reflect new way of disabling demo data
Merge pull request #419 from balsarori/model_editor_source

Model editor source
Merge pull request #414 from oefimov/reflectutilloadclass-and-custom-classloader

ReflectUtil.loadClass() and custom classloader
Merge pull request #402 from martin-grofcik/subProcess-created-event-fix

SubProcess ENTITY_CREATED fix
Merge pull request #396 from mikedias/patch-1

IdentityLink null-check
Merge pull request #409 from dbmalkovsky/JUnit

remove @Test annotation from JUnit3 based tests
Added @Test again to SpringJobExecutorTest and modified pull request #403 slightly