Mark assert_cli as deprecated

Cargo.toml

@@ -27,3 +27,4 @@ docmatic = "0.1"
 
 [badges]
 travis-ci = { repository = "assert-rs/assert_cli" }
+maintenance = { status = "deprecated" }

README.md

@@ -7,76 +7,10 @@
 ![License](https://img.shields.io/crates/l/assert_cli.svg)
 [![crates.io](https://img.shields.io/crates/v/assert_cli.svg)][Crates.io]
 
-## Install
+Note: `assert_cli`, in its current form, is deprecated.  The spiritual
+successor to `assert_cli` is [`assert_cmd`][assert_cmd].
 
-For your tests, add it to your `Cargo.toml`:
-
-```toml
-[dev-dependencies]
-assert_cli = "0.6"
-```
-
-## Example
-
-Here's a trivial example:
-
-```rust,ignore
-extern crate assert_cli;
-
-fn main() {
-    assert_cli::Assert::main_binary().unwrap();
-}
-```
-
-And here is one that will fail (and demonstrates running arbitrary commands):
-
-```rust
-extern crate assert_cli;
-
-fn main() {
-    assert_cli::Assert::command(&["ls", "foo-bar-foo"])
-        .fails()
-        .and()
-        .stderr().contains("foo-bar-foo")
-        .unwrap();
-}
-```
-
-If you want to match the program's output _exactly_, you can use
-`stdout().is` (and shows the macro form of `command`):
-
-```rust,should_panic
-#[macro_use] extern crate assert_cli;
-
-fn main() {
-    assert_cmd!(wc "README.md")
-        .stdout().is("1337 README.md")
-        .unwrap();
-}
-```
-
-... which has the benefit to show a nice, colorful diff in your terminal,
-like this:
-
-```diff
--1337
-+92
-```
-
-**Tip**: Enclose arguments in the `assert_cmd!` macro in quotes `"`,
-         if there are special characters, which the macro doesn't accept, e.g.
-         `assert_cmd!(cat "foo.txt")`.
-
-Assert Cli use [Environment][Environment] underneath to deal with environment variables.
-
-More detailed information is available in the [documentation]. :-)
-
-## Relevant crates
-
-Other crates that might be useful in testing command line programs.
-* [dir-diff][dir-diff] for testing file side-effects.
-* [tempfile][tempfile] for scratchpad directories.
-* [duct][duct] for orchestrating multiple processes.
+Stayed tuned to [Issue #41][future] for our reinventing `assert_cli` on top of `assert_cmd`.
 
 ## License
 
@@ -97,7 +31,5 @@ conditions.
 [Travis]: https://travis-ci.org/assert-rs/assert_cli
 [Crates.io]: https://crates.io/crates/assert_cli
 [Documentation]: https://docs.rs/assert_cli
-[Environment]: https://github.com/Freyskeyd/environment
-[dir-diff]: https://crates.io/crates/dir-diff
-[tempfile]: https://crates.io/crates/tempfile
-[duct]: https://crates.io/crates/duct
+[assert_cmd]: https://crates.io/crates/assert_cmd
+[future]: https://github.com/assert-rs/assert_cli/issues/41