use environment variable TEXINPUTS for tikz graphics; fixed #188
use environment variable TEXINPUTS for tikz graphics; fixed #188

antass/labnotebook3,fboehm/labnotebook,fboehm/cboettig_site,fboehm/labnotebook,fboehm/cboettig_site,fboehm/cboettig_site,fboehm/labnotebook,fboehm/labnotebook,antass/labnotebook3,fboehm/labnotebook,antass/labnotebook3,fboehm/cboettig_site,fboehm/cboettig_site,fboehm/labnotebook