Add new snippets for sh-mode: case, select

snippets/sh-mode/case

@@ -0,0 +1,10 @@
+# -*- mode: snippet -*-
+# name : case
+# key: case
+# --
+case ${1:cond} in
+    ${2:pattern} )
+        ${3:stuff}
+        ;;
+    $0
+esac

snippets/sh-mode/select

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# name : select
+# key: select
+# --
+select ${1:var} in ${2:stuff}; do
+    $0
+done