Fixed issue by adding transparency to similarValue calculation
Added additional test to check if only area within a border is filled
Added additional assert in test case
Merge branch 'master' into Issue_FillTool_Transparency
Fixed I54 with cleaning some code
Revert "Fixed I54 with cleaning some code"

This reverts commit 5d15ec3c02adeb435c6e619d3ae8e4dc78e09310.
Merge pull request #61 from Catrobat/Issue_FillTool_Transparency

Solved issue #48
Implementation: @michaelmuenzer [MM]
Acceptance: @galstc05 [SG]