change declaration variable in settings, opps core auto declaration
Fix channel admin.
Fix article admin.
Fix channel admin.
Fix image admin.
Fix source save.
Fix source admin.
Merge branch 'admin' of github.com:oppsproject/opps
Fix pep8 on channel admin
./opps/channel/admin.py:12:69: W291 trailing whitespace
./opps/channel/admin.py:15:28: E231 missing whitespace after ','
./opps/channel/admin.py:17:31: E231 missing whitespace after ','
./opps/channel/admin.py:22:73: W291 trailing whitespace
./opps/channel/admin.py:27:6: W291 trailing whitespace
Fix pep8 on image admin
./opps/image/admin.py:13:29: E231 missing whitespace after ','
./opps/image/admin.py:14:30: E231 missing whitespace after ','
./opps/image/admin.py:27:1: W293 blank line contains whitespace
Fix pep8 on source admin
./opps/source/admin.py:11:27: E231 missing whitespace after ','
./opps/source/admin.py:15:1: W293 blank line contains whitespace