working pillbox

still needs some refactoring to avoid looping through full entity list
tanklist

added the tanks list to the gameworld
Pillbox tests

Added tests for pillbox object and pillbox controller object
getCenter methods tests

added tests for getCenterx and getCentery of the entity  class
also fixed a warning in pillbox class
pillbox range

moved the range member from the controller to the pillbox itself
Merge pull request #225 from BU-CS673/production

Production
Merge branch 'production' into pmd3

Conflicts:
	bubolo/test/bubolo/test/MockWorld.java
Merge Conflicts

fixed merge conflicts and made corrections based on prelim feedback from
chris.

also eliminated getCenterX and getCenterY methods from entity and tests
as they are not used.
oops

missed a checkbox in previous commit
Preferences file

moved prefs.bolo to .settings/ folder so git will ignore it
Revert "Preferences file"

This reverts commit 810c1d4cc540a2828b614dccafc457b7e3f00fda.
fixed warning

non standard javadoc fixed
standards

non standard if statement fixed
Merge pull request #226 from BU-CS673/pmd3

Pillbox Controller