Sync install instructions

Author: rocky

INSTALL

@@ -1,5 +1,9 @@
 SHORT INSTRUCTIONS:
 
+To install from github, see README-git.md.
+
+To install a released version:
+
 0. download the latest bash debugger from:
    http://prdownloads.sourceforge.net/bashdb/?sort_by=date&sort=desc
 
@@ -34,8 +38,6 @@ SHORT INSTRUCTIONS:
    that umask, you may want to set the umask to something more
    permissive like 022, before running the "make install".
 
-That's it!
-
 - - - -
 
 This debugger needs a debugger-enabled version of Bash 4.1 or greater.

README.md

@@ -1,4 +1,5 @@
-Here we have a debugger (*the* debugger?) for Bash 3.0 and higher.
+Here, we have a debugger (*the* debugger?) for Bash 5.1. Other git
+branches cover other versions of bash.
 
 The command syntax generally follows that of the
 [zsh debugger ](https://github.com/rocky/zshdb) trepanning debuggers
@@ -69,4 +70,6 @@ switch:
 * [tree-structured reference manual](http://www.rodericksmith.plus.com/outlines/manuals/bashdbOutline.html)
 * [tree-structured reference manual](http://www.rodericksmith.plus.com/outlines/manuals/bashdbOutline.html)
 
-See *INSTALL* for generic GNU configure installation instructions.
+See *INSTALL* for installation instructions from a released tarball.
+
+See *README-git.md* for installing from git on github.