Isis now handles textual data in a much more consistent manner... this...

Isis now handles textual data in a much more consistent manner... this shouldn't impact any user-functionality. To developers: Isis' API now only utilizes QStrings. Please use the toString(...) and to*(QString) (i.e. toBool(QString), toInt(QString), ...) methods. All public API's should use/expect QString (not IString, not std::string). Fixes #1312.

git-svn-id: http://subversion.wr.usgs.gov/repos/prog/isis3/trunk@4928 41f8697f-d340-4b68-9986-7bafba869bb8