Add string next to the closing matchpair when at the eol. Closes #77.

test/autoclose_matchpairs.txt

@@ -24,3 +24,11 @@ let g:delimitMate_autoclose = 1
 # Handle backspace gracefully.
 set backspace=
 "(\<Esc>a\<BS>x" "(x)"
+
+# Add semicolon next to the closing paren. Issue #77.
+new
+let b:delimitMate_eol_marker = ';'
+"abc(x" "abc(x);"
+%d
+# BS should behave accordingly.
+"abc(\<BS>" "abc"