Add cheatsheet and examples for curl.

cheatsheets/curl

@@ -0,0 +1,24 @@
+# Download a file preserving the filename.
+curl http://example.com/file.zip -O
+
+# Download a file and specify a new filename.
+curl http://example.com/file.zip -o new_file.zip
+
+# Fetch only the HTTP headers from a response.
+curl -I http://example.com
+
+# Download all sequentially numbered files (1-24)
+curl http://example.com/pic[1-24].jpg
+
+# Download a file from FTP.
+curl -u username:password -O ftp://example.com/pub/file.zip
+
+# Get an FTP directory listing.
+curl ftp://username:password@example.com
+
+# Resume a previously failed download.
+curl -C - -o partial_file.zip http://example.com/file.zip
+
+# Fetch your external IP and network info. as JSON.
+curl http://ifconfig.me/all/json
+