Made reporting a package
Refactored reporting code into separate modules
Moved `xunit` under `reporting`
Cleaned imports under `reporting`
Merge pull request #69 from Zearin/refactor/reporting-pkg

Issue #69: Refactored `reporting` into a package
`color` module no longer assumes bold

Also provided better exports
Bold rulers! (live in `reporting.common` ☺)
Moved non-indent code from `indent_msg` to `humanized_print`
Update profile printing code
Updated `reporting.coverage` printing
Minor docstring tweaks
Merge pull request #70 from Zearin/feature/colors-fixes

#70: Various improvements to colorized output