Creating of a method that returns the latest date when given 2 dates and
it equivalent unit test, include the cd% parameter into determining
patients who needs the cd4 test based on cd4 counts,cd4% and the latest
date of the two and its equivalent unit test, tb screening form proper
mapping of concept from 1663 to 160737 for the option of not done.
Merge remote-tracking branch 'upstream/master'
Merge pull request #38 from ningosi/master

CD4% included in the determination for due for CD4
Added ability to FormManager to pick up tag handlers from registered components
* Removed ifMode as that fix is now in HFE core
Replaced the widget used for location searching to fix bugs and speed up page loads
* Added HFE tag handler to override <encounterLocation> to use new widget
* Added search configuration to JS layer to tell kenyaui how to search for locations
* Changed simpleLocation to return {id,name,code}