Added top-level usage to readme.

README.md

@@ -13,6 +13,30 @@ Commandline toolkit for inspecting and troubleshooting IRIG 106 Chapter 10/11 da
 
 ## Usage
 
+```
+Usage:
+    c10 <command> [<args>] [options]
+
+Commands:
+    allbus         Switch 1553 format 1 messages to indicate the same bus (a or b).
+    capture        Capture chapter 10 data from a pcap file.
+    copy           Copy a Chapter 10 file. Can selectively copy by channel, type, byte offset, or time.
+    dump           Dump hex (default), binary data, or PCAP from a Chapter 10 channel.
+    find           Search for a given value in Chapter 10 files.
+    frompcap       Wrap network data in a pcap file as Chapter 10 Message format.
+    help           Show general usage or help for a command.
+    inspect        Report on packets found in a file.
+    reindex        Remove or recreate index packets for a file.
+    stat           Inspect one or more Chapter 10 files and get channel info.
+    streamcheck    Plot data density of a channel in a Chapter 10 stream. Requires matplotlib.
+    timefix        Ensure that time packets are at 1-second intervals.
+
+Options:
+    -v, --verbose  Verbose output.
+    -q, --quiet    Minimal output.
+    -h, --help     Show general usage or help for a command.
+```
+
 Get top-level usage and list of commands with:
 
 ```