PLD: correct method for enketo endpoint
ME: added management command to convert xform id strings to lowercase
ME: xform id string conversion to lowercase before saving
ME: altered 'test_publish_xlsform' test case to accomodate id_string conversion to lowercase
ME: added 'iexact' to username query filter in logger folder's view.py
ME: fixed bug triggering 404 exception
ME: changed id_string query filters to use 'iexact'
ME: changed queries that filter by id_string and username to use iexact in main's view.py
ME: changed queries that filter by id_string and username to use iexact in restservice's view.py
ME: changed queries that filter by id_string and username to use iexact in viewer's view.py
ME: edited/added testcases to for requests with usernames and id_strings is different cases
ME: added testcase for requests with username and id_string in uppercase
ME: added testcase for requests with username and id_string in uppercase
ME: reverted to initial test case without upper case
DW: Added download form as an xls functionality
ME: added testcase for requests with username and id_string in uppercase in test_importing_database.py
DW: Removed commented code
ME: reverted change; id_string to be saved as it is
Merge pull request #543 from onaio/529-Add-download-form-as-XLSForm

DW: Added download form as an xls functionality
ME: reverted test case to initial state