FileGenerator now requests rebuild even if only one production missing

Added test for rebuild on missing file
Added note to Step docs about returning undef from last_run_time().
Merge pull request #9 from maxmind/eilara/rebuild-on-missing-files

Eilara/rebuild on missing files
Changes for missing file handling
Fixed spelling run_time -> last_run_time in Planner

Was causing builds to always rebuild when jobs > 1
Also add integration test for jobs 1..3
Merge pull request #10 from maxmind/eilara/add-integration-test

Eilara/add integration test
Use .pause-maxmind file for upload credentials
Bump version
v0.002007
Add a LICENSE file to the repo
Changes for next release
Bump version
v0.002008
Add weaver.ini
Add .mailmap for benefit of contributors plugins
Added atomic file generator prototype
Some small style tweaks in the code and docs
Added test for atomic file generator