Minor fixes to the classes JSON file

Corrected minor issues in the JSON file.

Issue: #30
Tidied classes.json file

Ran the classses.json file through JSONLint to tidy it.

Issue: #30
Tidied dieties.json

Ran dieties.json through JSONLint.

Issue: #30
Tidied feats.json

Ran feats.json through JSONLint.

Issue: #30
Minor fixes to feats.json

Corrected spelling mistakes and other minor fixes in feats.json

Issue: #30
Tidied languages.json

Ran languages.json through JSONLint.

Issue: #30
Tidied races.json

Ran races.json through JSONLint.

Issue: #30
Tidied skills.json

Ran skills.json through JSONLint.

Issue: #30
Minor fixes to skills.json

Changed case of ability scores and fixed a few spelling mistakes.

Issue: #30
Tidied spell_list.json

Ran spell_list.json through JSONLint.

Issue: #30
Merge branch 'jsonCleanup' into package