Revert bb19386b

The requirement for CMake 3.2.0 was introduced erroneously
in commit e29282d208 and is no
longer present

README.md

@@ -166,7 +166,7 @@ library archives (`.a`).
 | Dep          | Min. version  | Vendored | Debian/Ubuntu pkg  | Arch pkg     | Fedora            | Optional | Purpose        |
 | ------------ | ------------- | -------- | ------------------ | ------------ | ----------------- | -------- | -------------- |
 | GCC          | 4.7.3         | NO       | `build-essential`  | `base-devel` | `gcc`             | NO       |                |
-| CMake        | 3.2.0         | NO       | `cmake`            | `cmake`      | `cmake`           | NO       |                |
+| CMake        | 3.0.0         | NO       | `cmake`            | `cmake`      | `cmake`           | NO       |                |
 | pkg-config   | any           | NO       | `pkg-config`       | `base-devel` | `pkgconf`         | NO       |                |
 | Boost        | 1.58          | NO       | `libboost-all-dev` | `boost`      | `boost-devel`     | NO       | C++ libraries  |
 | OpenSSL      | basically any | NO       | `libssl-dev`       | `openssl`    | `openssl-devel`   | NO       | sha256 sum     |