Update INSTALL.txt

Author: cogmission

Diff for: INSTALL.txt

@@ -6,4 +6,4 @@ gradle >= 1.7
 Install:
 git clone https://github.com/numenta/htm.java.git
 cd htm.java
-gradle -Pskipbench check
+gradle check  (Use "gradle -Pskipbench check" for quicker sanity check)