Enhancement #118: Adding riverside location and achievement

[Immutablevoid]

After manual testing and running mvn test, changes seems to work successfully.

• Added location riverside
• Added functions for riverside location to only appear left and right of river/bridge location
• Added achievement for visiting 10 different riverside (Not sure how rewarding this achievement is, since riversides spawn along the river)
• Edited AchievementsJsonFileTest.java to include rule for new riverside achievement. (Unsure what the rule functionality does, even after looking through it)

[bernardosulzbach]

Of very high quality and works well.

Thank you.

When I added the achievements I ended up creating several unimaginative ones to be able to test the system. Maybe one day the game will have enough content to allow for a good number of meaningful, challenging achievements.

As a side note, I changed the commit message slightly. See this, for instance, which are some good guidelines. Mostly items 1 through 4.

[bernardosulzbach]

Closing manually, already rebased.

[Immutablevoid]

Oh, Thank you very much. I really like this project and it's concept. I will probably do more contributions when I have free time.

Oh and Thanks for the article ill go through it.