add readme

README.md

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+mal sends an email to one or more recipients, through information passed
+on its command line. Read COPYING for information on redistribution.
+
+## compilation
+
+Install ldc and curl, and run make. To install the binary systemwide,
+run make install after compiling.
+
+## usage
+
+Send an email from you@example.org to joe@example.org
+with the message body "hello!":
+
+    mal -m 'hello!' -t joe@example.org -P password123 you@example.org
+
+Read the message body from a file instead:
+
+    mal -M mesgfile -t joe@example.org -P password123 you@example.org
+
+Send the message to multiple recipients:
+
+    mal -M mesgfile -t joe@example.org -t jane@example.org \
+	  -P password123 you@example.org
+
+If SSL is not working properly, use an insecure connection with -k:
+
+    mal -k -m 'hello!' -t joe@example.org -P password123 you@example.org
+
+To send a message from an address with a plus in it, manually specify
+the username with -u:
+
+    mal -m 'hello!' -t joe@example.org -u you -P password123 you+malbot@example.org
+
+Read a quick usage example:
+
+    mal
+
+Man pages hopefully coming soon.