Fix token and compatibility warnings

Makefile

@@ -8,7 +8,8 @@ sty: $(NAME).dtx
 all: logo $(NAME) example clean
 	@exit 0
 logo: tau-logo-*.eps
-	find . -name 'tau-logo-*.eps' -exec epstopdf {} \;
+	find . -name 'tau-logo-*.eps' -exec \
+		epstopdf --gsopt=-dCompatibilityLevel=1.5 {} \;
 $(NAME): $(NAME).dtx
 	pdflatex --shell-escape $(NAME).dtx
 	makeindex -s gglo.ist -o $(NAME).gls $(NAME).glo

README.md

@@ -30,7 +30,7 @@ This creates the files `beamerthemetuni.sty` and `beamercolorthemetuni.sty`.
 Next generate pdf versions of the graphics by running
 
 ```bash
-find . -name ’*.eps’ -exec epstopdf {} \;
+find . -name ’*.eps’ -exec epstopdf --gsopt=-dCompatibilityLevel=1.5 {} \;
 ```
 
 In order for TeX to find the package, it needs to be on the `texmf` tree. By default, TeX looks for files in three different locations:

beamerthemetuni.dtx

@@ -23,7 +23,7 @@
 % ------------------------------------------------------------------------ \fi
 % \iffalse
 %<*driver|package>
-\def\tuniversion{2019/02/10 v1.0}
+\def\tuniversion{2019/07/29 v1.1}
 %</driver|package>
 %<*internal>
 \def\nameofplainTeX{plain}
@@ -177,9 +177,13 @@ and beamercolorthemetuni.sty.
 % \end{quote}
 % This creates the files |beamerthemetuni.sty| and |beamercolorthemetuni.sty|.
 %
+% \changes{v1.1}{2019/07/29}{Specify PDF compatibility level 1.5 in install
+%   intructions}
+%
 % Next generate |pdf| versions of the graphics by running
 % \begin{quote}
-%   |find . -name '*.eps' -exec epstopdf {} \;|
+%   |find . -name '*.eps' -exec \| \\
+%   |    epstopdf --gsopt=-dCompatibilityLevel=1.5 {} \;|
 % \end{quote}
 %
 % In order for \TeX\ to find the package, it needs to be on the |texmf| tree.
@@ -551,6 +555,18 @@ and beamercolorthemetuni.sty.
 % \end{macro}
 % \end{macro}
 %
+% \changes{v1.1}{2019/07/29}{Ignore line breaks when generating PDF strings}
+%
+% Defining a two row field used by \textsf{hyperref}, e.g. the author field,
+% results in a warning. The following tells \textsf{hyperref} to ignore
+% line breaks.
+%
+%    \begin{macrocode}
+\pdfstringdefDisableCommands{%
+  \def\\{}%
+}
+%    \end{macrocode}
+%
 % \subsubsection{Use with \textsf{biblatex}}
 %
 % Make \textsf{beamer} play nice with \textsf{biblatex}. Require