bootstrap: Move from build-aux/bootstrap

NOTE: To see history for files in this directory, run:

  $ git log --follow PATH

The previous home for the bootstrapping process was build-aux, but this has
evolved into quite the project in its own that such a directory strucutre is
no longer honest.  Further, I want the bootstrap process to get the
visibility in the source tree that it deserves, considering how vitally
important it is.

I preserved the original history rather than rewriting the commits because I
did not want the hashes to change---I have recorded some hashes elsewhere
as proof that early Ulambda existed when it did, since it is yet unpublished.

* bootstrap/Bootstrap.js: Renamed from build-aux/bootstrap/Bootstrap.js.
* bootstrap/birth.scm: Renamed from build-aux/bootstrap/birth.scm.
* bootstrap/bootstrap.html: Renamed from build-aux/bootstrap.html.
* bootstrap/bootstrap.js: Renamed from build-aux/bootstrap.js.
* bootstrap/libprebirth.js: Renamed from build-aux/bootstrap/libprebirth.js.
* bootstrap/prebirth.js: Renamed from build-aux/bootstrap/prebirth.js.
* bootstrap/rebirth.scm: Renamed from build-aux/bootstrap/rebirth.scm.
* bootstrap/rebirth/es.scm: Renamed from build-aux/bootstrap/rebirth/es.scm.
* bootstrap/rebirth/macro.scm: Renamed from build-aux/bootstrap/rebirth/macro.scm.
* bootstrap/rebirth/relibprebirth.scm: Renamed from
    build-aux/bootstrap/rebirth/relibprebirth.scm.

bootstrap/bootstrap.html

@@ -60,8 +60,8 @@ I'll wait for you to click the button below to get started.
       </p>
     </noscript>
 
-    <script type="text/javascript" src="bootstrap/prebirth.js"></script>
-    <script type="text/javascript" src="bootstrap/Bootstrap.js"></script>
+    <script type="text/javascript" src="prebirth.js"></script>
+    <script type="text/javascript" src="Bootstrap.js"></script>
 
     <script type="text/javascript">
       const loge = document.getElementById( 'log' );
@@ -80,7 +80,7 @@ I'll wait for you to click the button below to get started.
           const xhr = new XMLHttpRequest();
 
           xhr.responseType = 'text';
-          xhr.open( 'GET', `bootstrap/${path}`, true );
+          xhr.open( 'GET', `./${path}`, true );
 
           xhr.onload  = result => resolve( result.target.responseText );
           xhr.onerror = e => reject( e );

bootstrap/bootstrap.js

@@ -32,8 +32,8 @@
  * files in `./bootstrap/'.
  */
 
-const Bootstrap = require( './bootstrap/Bootstrap' );
-const Prebirth  = require( './bootstrap/prebirth' );
+const Bootstrap = require( './Bootstrap' );
+const Prebirth  = require( './prebirth' );
 
 const logf = ( str, e ) =>
 {
@@ -45,7 +45,7 @@ const logf = ( str, e ) =>
 };
 
 const getf = path => Promise.resolve(
-    require( 'fs' ).readFileSync( `./bootstrap/${path}` ).toString()
+    require( 'fs' ).readFileSync( `./${path}` ).toString()
 );
 
 const strap = new Bootstrap( getf, logf, new Prebirth() );