invoking singleton constructor of Configurator

[gansai]

After making singleton constructor of Configurator, updated Main class

[coveralls]

Coverage decreased (-0.37%) to 11.66% when pulling a54b00d on gansai:patch-2 into dfcac89 on oskopek:master.

[oskopek]

Hello @gansai! Thank you for your contribution. Next time, please submit one PR instead of two, if both commits refer to a single specific issue. You see, the automatic build on PR #14 failed to even compile, just because it references the "old" version of the Main class.

I will merge both of the PRs in one go and make a code style change on top (don't let that discourage you!). Thank you again for your contribution!

[oskopek]

Also, @gansai, if you want, add yourself to AUTHORS.adoc and submit a PR!

[gansai]

Thanks @oskopek for the opportunity to contribute to Open Source.
Yes, next time, I shall submit one PR instead of multiple.

[oskopek]

Thank you for your time and effort! I merged your AUTHORS.adoc PR.

[gansai]

Welcome. Your work is wonderful and thanks for opportunity to contribute.