Adding upstream version 0.7.0+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

cmd/gclip/README.md

@@ -0,0 +1,40 @@
+# gclip
+
+`gclip` command offers the ability to interact with the system clipboard
+from the shell. To install:
+
+```bash
+$ go install golang.design/x/clipboard/cmd/gclip@latest
+```
+
+```bash
+$ gclip
+gclip is a command that provides clipboard interaction.
+usage: gclip [-copy|-paste] [-f <file>]
+options:
+  -copy
+        copy data to clipboard
+  -f string
+        source or destination to a given file path
+  -paste
+        paste data from clipboard
+examples:
+gclip -paste                    paste from clipboard and prints the content
+gclip -paste -f x.txt           paste from clipboard and save as text to x.txt
+gclip -paste -f x.png           paste from clipboard and save as image to x.png
+cat x.txt | gclip -copy         copy content from x.txt to clipboard
+gclip -copy -f x.txt            copy content from x.txt to clipboard
+gclip -copy -f x.png            copy x.png as image data to clipboard
+```
+
+If `-copy` is used, the command will exit when the data is no longer
+available from the clipboard. You can always send the command to the
+background using a shell `&` operator, for example:
+
+```bash
+$ cat x.txt | gclip -copy &
+```
+
+## License
+
+MIT | &copy; 2021 The golang.design Initiative Authors, written by [Changkun Ou](https://changkun.de).