kristofer/JavaExercism: lots of exercises in java... from https://github.com/exercism/java

lots of exercises in java... from https://github.com/exercism/java

John Ryan 91a65d79d0 Merge pull request #156 from mienaikage/java-installation-instructions		10 lat temu
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img	Revamp installation and test instructions (#136)	10 lat temu
ABOUT.md	ABOUT: Minor formatting cleanups	10 lat temu
INSTALLATION.md	PPA for gradle	10 lat temu
LEARNING.md	Add Java learning resources	10 lat temu
TESTS.md	Revamp installation and test instructions (#136)	10 lat temu