Report directory can't be configured by CLI options

[shonie]

Version: v10.15.1
Platform: 4.18.0-14-generic #15-Ubuntu SMP Mon Jan 14 09:01:02 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Hello, @bcoe!

Thank you for so awesome tool.

I have tried c8 and it satisfies all my needs except one.
I have to generate two reports (one for unit tests coverage, other - for functional tests coverage). But the output directory is hardcoded for each run (see this line). So i am not able to collect artifacts on my CI for both: unit tests and functional tests. This is a very minor issue and if you don't mind, i will try to fix it and create a PR.

Best regards
shonie

[shinnn]

Fixed in #65.