oauth module taken out of zorba's core
I have added the correct categories for the modules that appear as part of the left menu tree of the XQDoc documentation. I have also update the external modules as well.
XQDoc rework.
Now zorba and each external module have two build targets: xqdoc-xml and xqdoc. 
xqdoc-xml is to generate the xml from xqdoc information.
xqdoc target is to generate the final html from the intermediary xml.
Zorba's xqdoc depends on the xqdoc-xml from zorba and all external modules.
You can also build the xqdoc target for a specific external module, and generate only its documentation. If the external module is built in zorba project, then the zorba internal modules' xqdoc is always generated.
new DECLARE_ZORBA_MODULE macro for all external modules + version 1.0 for all modules
Added DECLARE_ZORBA_SCHEMA() and cut over internal and external modules to
use it. Enhancements to DECLARE_ZORBA_MODULE(), including better API with
explicit parameters, and shorter target names to help Windows 260-character
path limitations.
XQDoc changes:
- STRING module went into XDM atomic
- http://www.zorba-xquery.com/modules/store/dynamic/documents was updated to 
  http://www.zorba-xquery.com/modules/store/documents/dynamic
- the symbol S for scripting goes http://xquery-scripting.ethz.ch/spec.html
- added the V symbol for variadic
- added the icon for streamable annotation
Moved non-W3C annotations to the Zorba namespace. Unknown annotations will raise errors.
Changes in xqdoc:
- Json module: Please take out the first paragraph: it's too detailed
- Json module: parse() and parse-ml() with 1 argument do not tell me much.I guess they are each an implementation of a certain set of options.
- rename security to cryptography
- xml should go into data convertors, like html (no top level xml directory)
- oauth should be top level
- programming languages (the one that contains xslt) should be top level
Restructure DECLARE_ZORBA_MODULE()/DECLARE_ZORBA_SCHEMA() to not create a ton
of mini-targets, to help clean up MSVC projects. Required introduction of
DONE_DECLARING_ZORBA_URIS() which is added to all module projects and Zorba.
fixed the aouth module and a small bug in the http-client
Disable fn:trace for oauth module.
Removing stale INSTALL directives from external modules.
XQuery version changes:
- Added XQuery version declarations for all the modules (part of the Zorba core or not).
- fixed the test "moduleDocumentation" that checks if all the modules are well documented:
  - this test used to check only the Zorba core modules: now it also checks the external modules.
  - added a new rule that makes sure all modules have a XQuery version declarations.

XQDoc changes:
- documented some XQDoc variables, params and return values that were missing.
- added support for XQuery version and Encoding in the Zorba XQDoc.
- added a new part called "XQuery version and Encoding for this module:" as the last lines in the module description of the XQDoc documentation.
Adding a automatic test case for each declared module which imports the module,
to ensure it compiles and can be imported. Fixed several bugs which were
revealed by those tests. Also, changed variable ZORBA_EXE_SCRIPT to
ZORBA_EXE and made this variable available in ZorbaConfig for other projects.
- improved the speed of "make xqdoc" such that we can add xqdoc as a test
- fixed SF bug #3375604 "Built target cxxdocs" hangs
- make xqdoc does not search the filesystem, instead creates the documentation *only* for the modules that are compiled in the Zorba version used (based on the ZorbaManifest.xml in the build folder)
- implemented the 2 issues that Dana asked for in the email from @coders "core and non-core Zorba modules"
- fixed the link crawler issues in XQDoc reported by Daniel (except the link to xqdoc.org)
re-enabled oauth test
Patch from Daniel to add check_apache_license target (verifies all files
as having appropriate license).
Converted all files to correct native EOLs.
Improve OAuth module.
Fix typo in module URI.