Better README.md

README.md

@@ -22,6 +22,35 @@
 ###### COMPILATION
 See INSTALL.md for more details.
 
+----------
+
+###### COMMAND LINE ARGUMENTS
+- `-q, --quality [value]` {Required}  
+    Sets the quality of the image. The higher the value is, better the result will be. Note that a value of 0 will mean
+    _lossless_ compression, which will not modify the original image, but will compress less. Allowed range is [0. 100].  
+    A common value for lossy compression is 80.
+- `-e, --exif`  
+    Keeps the JPEG metadata information during compression. File size will be slightly higher.
+- `-o, --output [value]` {Required}  
+    Path to the output folder where the compressed files will be stored. Can be the same input folder, which will overwrite the original files.
+- `-s, --scale [value]`  
+    Will scale the image to a factor of _[value]_. Allowed formats are decimal values, fractions and percentages.  
+    The factor must be a number > 0 and <= 1.0, as caesiumclt won't upscale any image.  
+    _This is an experimental feature and might not work as expected._
+- `-R, --recursive`  
+    If the input is a folder, caesiumclt will also scan every subfolder searching for images.  
+    Note that this may end up building a large set of files to be compressed and should be used carefully.
+- `-S, --keep-structure`  
+    If the input is a folder, and the `-R` option is set, caesiumclt will compress all the files keeping the original folder structure.
+- `-d, --dry-run`  
+    If this option is set, no files will be compressed, but the entire process will just be simulated.  
+    Useful for checking if all the files will be correctly handled.
+- `-h, --help`  
+    Displays a summary of the command line arguments, much like this one you're reading.
+- `-v, --version`  
+    Prints the current caesiumclt version.
+    
+
 ----------
 
 ###### USAGE EXAMPLES