Added installation section to README - currently only specifies insta…

…lling with cargo

README.md

@@ -5,6 +5,11 @@ Simple tool to download all receipts from [everyday rewards](https://www.woolwor
 This tool will download the pdf receipt as well as store the api response of the transaction alongside as json.  
 This sidecar file is useful as it contains the itemisation for the receipt - negating the need to strip text from the pdfs.
 
+## Installation
+
+If you are a Rust developer you can install from crates.io
+
+`cargo install everyday-rewards-receipts`
 
 
 ## Usage
@@ -72,4 +77,4 @@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
-```
+```