Diagram viewer supports display flow name.
Fixed icon centering for events, added message events
Flownode name is displayed for message events
ACTIVITY_CANCELLED event
Added bridge resolver, making available any objects registered through org.activiti.engine.test.mock.Mocks.register inside scripts supported by Activiti.
ACTIVITY_CANCELLED event replaces ACTIVITY_TIMEOUT event
businessRuleTask support of activiti:class attribute
modified resources to use RestUrlBuilder 
modified some tests to test full URL
Use i18nManager message when starting a process with form data

The message is originally written with hard code and should be modified to use i18nManager.
Merge pull request #432 from cheshenglin/patch-1

Use i18nManager message when starting a process with form data
minor typos
Merge pull request #434 from tiancheng2000/patch-3

minor typos
Various reviewer/editor type changes to the user guide.  The changes include
correcting some spelling and grammar mistakes.  Other changes include standardizing
on a single form of a word. Examples include i.e., BPMN, LDAP, JUnit, JSON, and JavaScript.
I either selected the common industry usage or the most prevalent usage in the
document.  Thus 'i.e.' was selected over 'ie.'.  In other cases where the usage was
large and split almost evenly I left them alone.  Such an example is 'eg.' vs. 'e.g.'.
when the first argument 'namespace' of BaseElement.getAttributeValue(String, String) is null, it should return the value of the first ExtensionAttribute whose 'namespace' field is also null
Fix for noRetriesLeft of job query
Merge pull request #436 from flytreeleft/master

`BaseElement.getAttributeValue(String, String)` will throw NullException when the first argument `namespace` is null
Merge branch 'UserGuideChanges' of https://github.com/dbmalkovsky/Activiti
Small changes to userguide
Merged pull request 411
Merge pull request #331 from henryyan/diagram-viewer-flow-name

Diagram viewer supports display flow name.