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Added Retrofit under REST Frameworks
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Added JDBI under Databases
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Removed JDBI entry from Database section from this pull request as adding multiple suggestions in the same pull request does not follow contribution guidelines.
Merge pull request #23 from jon-ruckwood/master

Networking and CI additions
Merge pull request #22 from dominicfarr/master

Update README.md
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Added Lanterna
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Readded javatuples, but added a info that the concept maybe debatable.
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Added Distribution topic.
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Removed Distribution
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Added Bintray
Added Shippable
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Readded Groovy.