Added interval argument (-i/--interval)

README.md

@@ -29,22 +29,20 @@ Change into the new directory:
 
     cd spacetray
 
-To compile the sources, run:
+To configure and compile the sources, run:
 
-    mkdir build
-    cd build
-    cmake ..
-    make
+    cmake -S . -B build
+    cmake --build build
 
 This will compile spacetray with status icon and notification support.
 
-Just copy "bin/spacetray" to a folder in your $PATH. I do:
+Just copy "build/spacetray" to a folder in your $PATH. I do:
 
-    cp ./bin/spacetray ~/bin/
+    cp ./build/spacetray ~/bin/
 
 You can copy the file to /usr/bin to make it available to all users but I don't. If you want that just run:
 
-    sudo cp ./bin/spacetray /usr/bin/
+    sudo cp ./build/spacetray /usr/bin/
 
 Configuration:
 --------------
@@ -56,12 +54,20 @@ Usage:
 
 Run spacetray with:
 
-    ./bin/spacetray <statusurl> &
+    ./build/spacetray <statusurl> &
 
 Or if in your $PATH:
 
     spacetray <statusurl>
 
+The polling interval defaults to 300 seconds (5 minutes). It can be changed with the `-i` or `--interval` option, given either before or after the status URL:
+
+    ./build/spacetray <statusurl> -i 60 &
+
+    ./build/spacetray -i 60 <statusurl>
+
+The interval is specified in seconds and must be a positive number.
+
 Themes:
 -------
 
@@ -105,4 +111,3 @@ to:
 in:
 
     ./spacetray.cpp
-