Update copyright on our source files

[gvaidees]

This should include tests also I would think.

[gvaidees]

This can come after code freeze, but we need to be absolutely sure that this will not cause any regressions

[ehennum]

Please update test-complete/*.js and *.xqy to change
Copyright 2014 MarkLogic Corporation
to
Copyright 2014-2015 MarkLogic Corporation
When done, please assign this issue to Kim Coleman for updating the resources used to generate the documentation. (Because no good deed goes unpunished.)

[gvaidees]

Updated copyrights of xqy and js files under test-complete and test-complete/data. I have made the changes in develop branch