Update README.md

README.md

@@ -1,3 +1,17 @@
 # cronwrapper
 
-Wrapper for cronjobs to handle failures in manageable ways.
+Wrapper for cronjobs to handle failures in a more sane way.
+
+## Features
+  * Set a time limit for how long cron job are allowed to run
+  * Detect failures based on exit codes and output to stderr
+  * Restrict how often a cron job should send output mail on failure
+  * Ensure that only a single instance of the cron job is running at any time
+
+
+## Usage
+Just run `cronwrapper --help` to check available options and flags. Decide on
+your preferences, and define your cronjob like this:
+
+`* * * * * root /usr/local/bin/cronwrapper -n awesome_job -- /path/to/cronjob --cronjobflag`
+