History support 2.0
bug
bad choice with array
readme
Use engine label instead of engine location
config support
working history
documentation
fix test
updated save task
Merge pull request #181 from JakeChampion/engine_label

Use engine label instead of engine location in file name
Merge branch 'master' into history-mk11
Merge pull request #180 from BBC-News/history-mk11

History support 2.0