Modified all iDistance sensors to return float.

Signed-off-by: Serban Waltter <serban.waltter@rinftech.com>

src/maxsonarez/maxsonarez.cxx

@@ -63,7 +63,7 @@ int MAXSONAREZ::inches()
   return int(volts / m_vI);
 }
 
-int MAXSONAREZ::getDistance()
+float MAXSONAREZ::getDistance()
 {
-   return (inches() * 2.54);
+   return inches() * 2.54;
 }

src/maxsonarez/maxsonarez.hpp

@@ -96,7 +96,7 @@ namespace upm {
      *
      * @return Distance to the object in inches
      */
-    virtual int getDistance();
+    virtual float getDistance();
 
   private:
     mraa_aio_context m_aio;