Fix compilation errors TeX Live 2014

Introduced a fix in artist for PGF v3, and needed to rerun all plots which
included data labels.  Some plots were rerun using my analysis repository.

Unfortunately, the externalize library won't work and my 'longprocess'
plots take up to much TeX memory and won't run unchanged (this has always
been the case, one needs to add extra_mem_top to texmf.cnf).  I'll try to
work around this.