Convert adapter setting to symbol
Add utility to convert existing definitions to JSON
Rename tld definition file to tld

In this way we can derive type from file name.
Create .json definitions under /data
Make JSON definitions the default version

JSON definitions appear to be way more efficient.

$ ruby utils/bm_json_vs_ruby.rb 
Rehearsal ----------------------------------------------------------------
JSON definitions single load   0.010000   0.000000   0.010000 (  0.008541)
Ruby definitions single load   0.010000   0.000000   0.010000 (  0.018428)
JSON definitions               7.410000   0.120000   7.530000 (  7.537326)
Ruby definitions              14.500000   0.340000  14.840000 ( 15.160304)
------------------------------------------------------ total: 22.390000sec

                                   user     system      total        real
JSON definitions single load   0.010000   0.000000   0.010000 (  0.005865)
Ruby definitions single load   0.010000   0.000000   0.010000 (  0.012682)
JSON definitions               7.370000   0.110000   7.480000 (  7.488888)
Ruby definitions              13.980000   0.310000  14.290000 ( 14.300507)
Fix invalid path
Include /data folder in the final gem
Fix inclusions
Update CHANGELOG
Definitions are now stored as JSON.