Add curl as necessary package.

This is needed as wget has issues with secure connection on HubiC.

For the record this command fails:

$ wget -S --max-redirect 0 https://api.hubic.com/oauth

If curl is installed it will be used instead of wget.

README

@@ -12,7 +12,7 @@ BUILDING:
             openssl-devel json-c-devel
 
     For GNU/Debian or Ubuntu:
-        apt-get install gcc make libfuse-dev pkg-config \
+        apt-get install gcc make curl libfuse-dev pkg-config \
             libcurl4-openssl-dev libxml2-dev libssl-dev libjson-c-dev
 
     Cloudfuse is built and installed like any other autoconf configured code.