added readme, renamed the script file

diff --git a/README.mdwn b/README.mdwn
new file mode 100644 (file)
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--- /dev/null
+++ b/README.mdwn
@@ -0,0 +1,9 @@
+# generate-ics
+
+    ./generate-ics < lp-schedule.csv
+
+See the generate-ics file for an example of usable CSV input.
+
+The main file is licensed under GPL-3.0-or-later, and the ICS.php file is under
+the Unlicense.
+

diff --git a/generate-ics.php b/generate-ics
similarity index 100%
rename from generate-ics.php
rename to generate-ics