parts bin import crash when the parts bin is bad

git-svn-id: http://fritzing.googlecode.com/svn/trunk@6860 85f94c43-f63a-0410-9d22-21439860c375
parts bin import losing text separators

git-svn-id: http://fritzing.googlecode.com/svn/trunk@6861 85f94c43-f63a-0410-9d22-21439860c375