Remember postcode and allow skipping it.
Merge pull request #69 from gregwym/skip-postcode

Remember postcode and allow skipping it.
Click start button on enter key.
Merge pull request #70 from gregwym/postcode-enter

Click start button on enter key.
Typo.
Use ModelSerializer instead of HyperlinkedModelSerializer.
Merge pull request #72 from gregwym/api-model

Use ModelSerializer instead of HyperlinkedModelSerializer.