Fixed v2 major version

Fixed v2 major version.

Environment Variables supported.

Change log

• Added support to environmet variables

Breaking changes

• Now on call gonfig.Load the struct that will be populated is the first parameter and the path is no longer mandatory.

TOML

Change log

• Added toml support.

YAML!

Change Log

• Added YAML support.

Tests improved

Change log

• Tests improved
• Fixed misspelling

Minor refactor

Change Log

• Load function splitted into mor function based on its funcionality.
• Added v in the version tag.

XML support

XML

• XML files are now supported.

Project structure

• config files for tests are now in the test folder.

JSON support

1.0.0

• Created json support (The only one until now);
• Created examples.