Create wrapper class to create consistent log messages.

Create wrapper class to create consistent log messages.

I wrapped methods in the Log class of gwt-log to add the method names
from the servlet and create consistent formatting of the document title
and table names in the log messages.

* src/main/java/org/glom/web/server/Log.java: New file with wrapped methods.
* src/main/java/org/glom/web/server/OnlineGlomServiceImpl.java: Convert all
log methods to use methods from wrapped Log class.