Rename config to opencontrol

[jcscottiii]

Closes #203

Builds on #206

• Created a common package inside lib and moved the contents of config/common in there.
  • Other packages were using it, so it makes sense to move it to a broader location and not specifically in config.
• Renamed lib/config to lib/opencontrol
• Renamed ResourceGetter to Getter inside the package resources
  • Now, it reads as resources.Getter instead of resources.ResourceGetter
• Renamed ConfigWorker to Worker.
• Renamed the interfaceBaseSchema to OpenControl
  • Each version of the opencontrol.yaml will implement the functions of the OpenControl interface.

[codecov-io]

Current coverage is 93.15% (diff: 98.61%)

Merging #207 into master will increase coverage by 1.79%

@@             master       #207   diff @@
==========================================
  Files            33         48    +15   
  Lines          1204       1695   +491   
  Methods           0          0          
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits           1100       1579   +479   
- Misses           81         88     +7   
- Partials         23         28     +5   

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[jcscottiii]

Ready to review! Will need rebase after #206 is merged