add invoice symlinks

diff --git a/texmf/tex/latex/invoice.def b/texmf/tex/latex/invoice.def
new file mode 120000 (symlink)
index 0000000..6dc2953
--- /dev/null
+++ b/texmf/tex/latex/invoice.def
@@ -0,0 +1 @@
+../../invoice.def
\ No newline at end of file

diff --git a/texmf/tex/latex/invoice.sty b/texmf/tex/latex/invoice.sty
new file mode 120000 (symlink)
index 0000000..f835a8b
--- /dev/null
+++ b/texmf/tex/latex/invoice.sty
@@ -0,0 +1 @@
+../../invoice.sty
\ No newline at end of file