add requirements.txt
Merge pull request #1 from shonenada/add-requirements

add requirements.txt
rename from field_application to landlord
Merge pull request #2 from shonenada/refactor/rename

rename from field_application to landlord
clean codes.(pep8)
Merge pull request #3 from shonenada/refactor/pep8

clean codes.(pep8)
change the name and follow the PEP8