update README for new usage

README.md

@@ -2,36 +2,40 @@
 
 This is as easy as it gets! A minimal CLI for go templates.
 
-Read JSON data from stdin and apply it to the template file. Alternatively,
-read the template from stdin and the JSON data from a file!
+Read JSON/YAML data from stdin and apply it to the template file.
+Alternatively, read the template from stdin and the JSON/YAML data from a file.
 
-Functions from [sprig](https://github.com/Masterminds/sprig) are included in
-`timplit`.
+Functions from [sprig](https://github.com/Masterminds/sprig) are included and
+available in timplit.
 
-## Examples
+## Installation
 
-Read JSON from stdin and apply it to a template file:
 ```bash
-cat data.json | timplit template.tmpl
-
-# Same as
-timplit template.tmpl <data.json
+go install github.com/tnyeanderson/timplit@latest
 ```
 
-Read JSON from a file and apply it to the template from stdin:
+## Usage
+
+See usage with `timplit -h`.
+
+## Examples
+
 ```bash
-# Invert the logic with the -j flag
-cat template.tmpl | timplit -j data.json
+# Read JSON from stdin and apply it to a template file
+cat data.json | timplit template.tmpl
+
+# Same as above
+timplit -t template.tmpl <data.json
 
-# Same as
+# Read JSON from a file and apply it to the template from stdin
 timplit -j data.json <template.tmpl
-```
 
-## Top-level JSON array
+# Read YAML from a file and apply it to the template from stdin
+timplit -y data.yaml <template.tmpl
 
-If the top level of the incoming JSON is an array, it will get wrapped in an
-object (under the `items` property) to ensure that it can be unmarshaled. 
+# Read YAML from stdin and apply it to a template file
+timplit -Y template.tmpl <data.yaml
+```
 
-For instance, `[1, 2, 3]` will become `{"items": [1, 2, 3]}`. See
-`example/array.tmpl` and `example/array.json` for a practical demonstration.
+Example JSON/YAML/template files are available in `cmd/testdata`.