Revert "Start send text capabilities."

This reverts commit b847811dd4e99b53b4ce1f5030d1e6e11388c254.
added master/detail flow template for trainee list
refactored
added implementation for trainee_list. works with trainer API now.
added API handler - supports POST and GET with or without authentication. will add comments soon.
added some javadoc for APIHandler
changed TraineeListFragment to match change in Trainer API database.
fixed the reload thing
updated APIHandler requests to return JSONObject instead of String
changed location of tests