update readme

README.md

@@ -19,7 +19,7 @@ go install github.com/miguelmota/cointop
 #### Alternatively (without go)
 
 ```
-sudo curl -s https://raw.githubusercontent.com/miguelmota/cointop/master/install.sh | bash
+sudo curl -s "https://raw.githubusercontent.com/miguelmota/cointop/master/install.sh??$(date +%s)" | bash
 ```
 
 ## Usage

install.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 
 echo "downloading..."
-curl https://github.com/miguelmota/cointop/raw/master/bin/cointop -o cointop
+curl -s "https://github.com/miguelmota/cointop/raw/master/bin/cointop" -o cointop
 echo "installing..."
 mv cointop /usr/local/bin/
 echo "cointop installed."