Some changes in the README.md.

README.md

@@ -4,17 +4,39 @@ This is a simple standalone tool that emulates the Unix 'tree' command in HDFS.
 
 ## USAGE
 
-To use it just copy the tool, add it to your path and: 
+To use it just copy the tool, add it to your path it's ready to use, it has 3 options: 
+
+* -p: Specifies the root path. This is mandatory.
+* -l: Specifies that you want to use the local filesystem instead of HDFS:
+* -s: Specifies that you want to see the size (in human readable format) next to each directory. 
+
+some examples: 
 
     hdfstree -p /
-    This will print all the HDFS tree
+    This will print all the HDFS tree. This will take some time...
 
     hdfstree -p /user/marc/ 
     Print all the directories starting from /user/marc
 
-    hdfstree -l -p /Users/marc/Music
-    Print all the directories in the local filesystem.
-
+    hdfstree -l -p /Users/marc/Music -s 
+    Print all the directories in the /Users/marc/Music directory in the local filesystem and display the sizes. 
+
+The output is pretty much like the unix tree command. Have an example: 
+
+    └──/Users/marc/work/hdfstree
+        ├──.git
+        |   ├──branches
+        |   ├──hooks
+        |   ├──info
+        |   ├──logs
+        |   |   └──refs
+        |   |       ├──heads
+        |   |       |   └──mdepalol
+        |   |       └──remotes
+        |   |           └──origin
+        |   ├──objects
+        ...
+
 ## BUILDING & SOURCE
 
 Build is done with [gradle](http://www.gradle.org/). To create a ready to use script with the libraries just use: 
@@ -25,4 +47,4 @@ You'll get the executable script + the libraries in
 
     hdfstree/build/install/hdfstree
 
-
+just add this directory (hdfstree/build/install/hdfstree/bin) to your PATH variable and you are done, also, make sure you have the HADOOP\_HOME environment variable set. The program will complain if you don't have it.