Doc: Update README with examples

README.md

@@ -4,3 +4,63 @@ A linter for YAML files.
 
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+
+Compatible with Python 2 & 3.
+
+## Usage
+
+```sh
+yamllint my_file.yml my_other_file.yaml ...
+```
+
+```sh
+yamllint -c ~/myconfig my_file.yml
+```
+
+```sh
+# To output a format parsable (by editors like Vim, emacs, etc.)
+yamllint -f parsable my_file.yml
+```
+
+## Installation
+
+```sh
+pip install yamllint
+```
+
+## Configuration
+
+There is no documentation yet, so here is what you need to know: you can
+override some rules, disable them or pass them in *warning* (instead of
+*error*). Have a look at the content of `yamllint/conf/default.yml` and create
+your own configuration file.
+
+It could look like this:
+
+```yaml
+# This is my first, very own configuration file for yamllint!
+# It extends the default conf by adjusting some options.
+
+extends: default
+
+rules:
+  # 80 should be enough, but don't fail if a line is longer
+  line-length:
+    max: 80
+    level: warning
+
+  # accept both
+  #    key:
+  #      - item
+  # and
+  #    key:
+  #    - item
+  indentation:
+    indent-sequences: whatever
+
+  # don't bother me with this rule
+  comments-indentation: disable
+```
+
+Tip: if you have a `.yamllint` file in your working directory, it will be
+automatically loaded as configuration by yamllint.