Move pages under tldr, lint run.sh, update docs

tldr/csslint

@@ -0,0 +1,33 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# csslint
+
+> A linter for CSS code.
+> More information: <https://github.com/CSSLint/csslint/wiki/Command-line-interface>.
+
+- Lint a single CSS file:
+
+`csslint {{file.css}}`
+
+- Lint multiple CSS files:
+
+`csslint {{file1.css file2.css ...}}`
+
+- List all possible style rules:
+
+`csslint --list-rules`
+
+- Treat certain rules as errors (which results in a non-zero exit code):
+
+`csslint --errors={{errors,universal-selector,imports}} {{file.css}}`
+
+- Treat certain rules as warnings:
+
+`csslint --warnings={{box-sizing,selector-max,floats}} {{file.css}}`
+
+- Ignore specific rules:
+
+`csslint --ignore={{ids,rules-count,shorthand}} {{file.css}}`