correct INSTALL file

Author: tmatth

INSTALL

@@ -1,8 +1,8 @@
-Installing Speex is as easy as:
+Installing SpeexDSP is as easy as:
 
 % ./configure [--prefix=<install-path>]
 % make
 % make install
 
-Note that if you are using the code from SVN, you will need to run "autogen.sh"
-instead of "configure".
+Note that if you are using the code from git you will need to run "autogen.sh"
+and then "configure".