[IETANKS-40]Added base for frontend development:
	* decided on Phaser in the end (gives some good abstractions over tiled map and there are tons of tutorials)
	* for now using bower for dependencies (see bower.json file)
	* each squad will create its own angular module which we can then add in app.js to modules seen (and to angularRoute so it sees the partial HTMLs)
	* for now using base Bootstrap css, we can always generate one with custom colours
adding maven-exec plugin automatically firing bower install
[IETANKS-40]Added base for frontend development:
	* decided on Phaser in the end (gives some good abstractions over tiled map and there are tons of tutorials)
	* for now using bower for dependencies (see bower.json file)
	* each squad will create its own angular module which we can then add in app.js to modules seen (and to angularRoute so it sees the partial HTMLs)
	* for now using base Bootstrap css, we can always generate one with custom colours
adding maven-exec plugin automatically firing bower install
Merge remote-tracking branch 'origin/frontend' into frontend
First, empty version of map. For now its just static, ground-level part
basic logic for moving and creating tanks added
   * some small sprites added
   * base for state created
   * scaling of grid
added coloring of tanks
Moved Junit, Fest-Assertions and Guava dependencies to master pom
Added mockito to parent pom
Added dependencies to sandbox module
First skeleton of implementation
Added google-http-client library
Fixed pom for ieTanks-engine after moving Junit, Fest and Guave to parent pom.
Implemented HttpBotService. Written some parts of SimpleSandbox class.
ieTanks-engine pom fixing after rebase.
Unfortunately very big commit.

Had to change in very primitive way all of the bot/tank ids from int/Integer to String - bot service has ids in String format and they can contain alphanumeric characters. It can be fixed later.

Finished simple integration with GamePlay. GamePlay class now returns UUID as a result of starting new game. Each game has UUID assigned to it during creation so it is accessible right away.

Introduced BotId class to gameplay module for some typesafety.

BotAlgorithm is (or should be) proper value class - it is no longer an interface.

All tests except one in gameplay module should pass.
Formatting in sandbox module
Added todos for future work
Introduce BotIdJson class to sandbox module that has Jackson annotations for JSON mapping.