first draft for 0.6.0

* provide config and rspec templates
* move eq_base from missing into its own task
* improve terminal output
readme: adding new tasks
New output format options for reports

Valid options: terminal-table (the only one available before), yaml, json, and inspect.
Better error message for #75
specs for child <- scope merge conflicts

can happen on Siblings#set and Siblings#merge
refs #75 fixes, warn on value <- scope conflict
add-missing keys present in locale but not base
readme relative_roots [ci skip]
Bumpt to v0.6.0