[Java] Main README formatting.
[Java] Main README formatting.

real-logic/Aeron,mikeb01/Aeron,galderz/Aeron,galderz/Aeron,mikeb01/Aeron,EvilMcJerkface/Aeron,real-logic/Aeron,EvilMcJerkface/Aeron,EvilMcJerkface/Aeron,mikeb01/Aeron,galderz/Aeron,real-logic/Aeron,real-logic/Aeron,EvilMcJerkface/Aeron,galderz/Aeron,mikeb01/Aeron