Clean up flake8 Errors

[dcslagel]

cd las-util-django/src/las_util
flake8 *.py

admin.py:1:1: F401 'django.contrib.admin' imported but unused
cntrl.py:22:1: W293 blank line contains whitespace
cntrl.py:46:30: W291 trailing whitespace
cntrl.py:54:80: E501 line too long (82 > 79 characters)
models.py:14:1: E302 expected 2 blank lines, found 1
models.py:19:1: E302 expected 2 blank lines, found 1
models.py:25:1: E302 expected 2 blank lines, found 1
models.py:35:80: E501 line too long (85 > 79 characters)
models.py:37:80: E501 line too long (86 > 79 characters)
serializers.py:12:1: E302 expected 2 blank lines, found 1
serializers.py:18:1: E302 expected 2 blank lines, found 1
urls.py:16:5: E265 block comment should start with '# '
urls.py:18:5: E265 block comment should start with '# '
urls.py:25:5: E265 block comment should start with '# '
urls.py:27:5: E265 block comment should start with '# '
views.py:28:1: E302 expected 2 blank lines, found 1
views.py:45:1: E302 expected 2 blank lines, found 1
views.py:67:1: E302 expected 2 blank lines, found 1
views.py:72:80: E501 line too long (81 > 79 characters)
views.py:83:1: E302 expected 2 blank lines, found 1
views.py:121:33: F821 undefined name 'form'
views.py:130:1: E303 too many blank lines (3)