Add important note to the documentation for KTextEditor plugins.
Add important note to the documentation for KTextEditor plugins.

svn path=/trunk/KDE/kdelibs/interfaces/ktexteditor/; revision=478037

DickJ/kate,hlamer/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,DickJ/kate,hlamer/kate,sandsmark/kate,DickJ/kate,hlamer/kate,cmacq2/kate,hlamer/kate,jfmcarreira/kate,hlamer/kate,sandsmark/kate,hlamer/kate,DickJ/kate,sandsmark/kate,cmacq2/kate,cmacq2/kate,jfmcarreira/kate,hlamer/kate,hlamer/kate,sandsmark/kate