Fix bin/publish: copy docs.dist from project root

Fix bin/publish: use correct .env path for rspade_system
Fix bin/publish script: prevent grep exit code 1 from terminating script

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node_modules/postcss-merge-rules/README.md

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+# [postcss][postcss]-merge-rules
+
+> Merge CSS rules with PostCSS.
+
+## Install
+
+With [npm](https://npmjs.org/package/postcss-merge-rules) do:
+
+```
+npm install postcss-merge-rules --save
+```
+
+## Examples
+
+This module will attempt to merge *adjacent* CSS rules:
+
+### By declarations
+
+#### Input
+
+```css
+a {
+    color: blue;
+    font-weight: bold
+}
+
+p {
+    color: blue;
+    font-weight: bold
+}
+```
+
+#### Output
+
+```css
+a,p {
+    color: blue;
+    font-weight: bold
+}
+```
+
+### By selectors
+
+#### Input
+
+```css
+a {
+    color: blue
+}
+
+a {
+    font-weight: bold
+}
+```
+
+#### Output
+
+```css
+a {
+    color: blue;
+    font-weight: bold
+}
+```
+
+### By partial declarations
+
+#### Input
+
+```css
+a {
+    font-weight: bold
+}
+
+p {
+    color: blue;
+    font-weight: bold
+}
+```
+
+#### Output
+
+```css
+a,p {
+    font-weight: bold
+}
+
+p {
+    color: blue
+}
+```
+
+## Usage
+
+See the [PostCSS documentation](https://github.com/postcss/postcss#usage) for
+examples for your environment.
+
+## Contributors
+
+See [CONTRIBUTORS.md](https://github.com/cssnano/cssnano/blob/master/CONTRIBUTORS.md).
+
+## License
+
+MIT © [Ben Briggs](http://beneb.info)
+
+[postcss]: https://github.com/postcss/postcss