Project#envvar method naming fix

[mtchavez]

• Tests added
• All tests pass
• Branch is up to date and mergeable
• README and documentation updated

Changes

• Fix from plural envvar to envvars for consistency with API endpoint
• Preserve old functionality

Verify

Example in README for envvar call should work now.

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fixes #70

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.

[coveralls]

Coverage decreased (-1.7%) to 97.688% when pulling d9a5a20 on typo into 4162161 on master.