Added two more builtin functions, eval and merge_properties, added common attributes of Person
entity to ui view.
Modified AsyncBuffer and others to fix asynchronous HtmlServlet implementation.
Removed stack trace output in StructrHttpServiceConfig when trying to identify dynamic entities.
Async test.
Removed some debugging and stack trace output, re-added isAsync flag, fixed concurrency issues
with LinkedList in AsyncBuffer.
Merge branch 'develop' of github.com:/structr/structr into develop

Conflicts:
	structr-rest/src/main/java/org/structr/rest/service/HttpService.java
	structr-ui/src/main/java/org/structr/web/common/AsyncBuffer.java
	structr-ui/src/main/java/org/structr/web/servlet/HtmlServlet.java
Merge branch 'async_test' into develop

Conflicts:
	structr-rest/src/main/java/org/structr/rest/service/HttpService.java
	structr-ui/src/main/java/org/structr/web/servlet/HtmlServlet.java