References #455

- Each entry point into the ScriptContext needs a ScriptLock of
  this context.
- Don't create JSRequests all over the place
- Use JS_SetContextThread on each entry-point (JSContextThread)
- Create local roots when allocating values
- Use reentrant-locks only with properties which need to be
  reentrant.
- Fixed tests

Closes #408, #436
References #455

Added setFlag and getFlags calls:

/json/property/getFlags?path=xxx
/json/property/setFlag?path=xxx&flag=FLAG&value=boolean

where flag can be READABLE, WRITEABLE or ARCHIVE

But only do so if the node has the PropertyNode::ARCHIVE
flag set.

- Pass the caller as well as the changed node
  to listeners
- Changes to flags are changes too

Closes #432

Merge commit 'refs/merge-requests/169' of git://gitorious.digitalstrom.org/dss/dss-mainline into integration

Merge commit 'refs/merge-requests/169' of git://gitorious.digitalstrom.org/dss/dss-mainline into integration

Closes #427

References #463

Fixes #463

References #188

References #188

References #188

References #188

References #188

References #188

References #188

the previous commit to create-dss-release hardcoded a particular
version of the dss; replace this with the parameter passed into
the script

Merge commit 'refs/merge-requests/166' of git://gitorious.digitalstrom.org/dss/dss-mainline into integration

Fixes #461

Merge commit 'refs/merge-requests/164' of git://gitorious.digitalstrom.org/dss/dss-mainline into integration

Merge commit 'refs/merge-requests/165' of git://gitorious.digitalstrom.org/dss/dss-mainline into integration

References #75

Also fixed an iterator-invalidation if a script added/removed
subscriptions during event-interpretion.

As discussed, renamed blockingCallback() to startBlockingCall() and
leavingBlockingCallback() to endBlockingCall()

The cleanup code in the ScriptContextWrapper object was expecting an
existing property node, which is not the case in the test environment.
While the constructor was handling this correctly, the check in the
destructor was not made.

Fixed by adding the check to the destructor ScriptContextWrapper
destructor.

Merge commit 'refs/merge-requests/163' of git://gitorious.digitalstrom.org/dss/dss-mainline into integration