Enabled injection of mail templates from vars as well as fields
Make text columns in h2 and mysql dbs actually be text (not varchar)

Conflicts:

modules/activiti-engine/src/main/java/org/activiti/engine/impl/Repositor
yServiceImpl.java

modules/activiti-engine/src/main/java/org/activiti/engine/test/ActivitiR
ule.java
Use Context.getProcessEngineConfiguration 

in preference to casting execution.getEngineServices().
Merge remote-tracking branch 'origin/mail'
Merge origin/textFields to use text rather than varchar cols (h2 and mysql only)