fixed bug when the package doesn't exists, created createErrorImage #49
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The 3 commits' message describe the PR,![error](https://camo.githubusercontent.com/dfe47c6eaa35fc77241d6c2d7aeef615d70f7f19804990d7b79eef6e874a192d/68747470733a2f2f662e636c6f75642e6769746875622e636f6d2f6173736574732f3533303430362f3631333335352f63383534323432302d636530302d313165322d393835312d3262663433383731383439332e706e67)
creates some error images and they looks like this: