get all the config data into a single object
put config handling closer together
call correct function
fix missing commas
manually destructure correct number of tuple members
remember to instantiate form classes
Merge pull request #438 from PyBossa/generalise-importers2

Generalise importers2 - continue the work towards making "task importers" first class / configurable
fix else after tail call
remove else after tail call
move response call into own function
factor together duplicated test conditions
reverse sense of test
remove redundant variable
remove redundant else after tail call
remove else after tail call
factor renderer args back together
factor error branches back together
remove else after tail call
DRY 20-line repeated section
move exceptional cases into first part of branch