New installer

Features:
+when update, disabled plugins stay disabled
+if new install, choice to disable some plugins

plugins.d/perlbrew.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+#Display useful information about the perlbrew installation.
+#If a module is given the version and location of the module is displayed.
+perlbrew info
+
+<<COMMENT
+
+Current perl:
+  Name: perl-5.30.1
+  Path: /Users/bruno/perl5/perlbrew/perls/perl-5.30.1/bin/perl
+  Config: -de -Dprefix=/Users/bruno/perl5/perlbrew/perls/perl-5.30.1 -Aeval:scriptdir=/Users/bruno/perl5/perlbrew/perls/perl-5.30.1/bin
+  Compiled at: Dec 16 2019 08:44:12
+
+perlbrew:
+  version: 0.87
+  ENV:
+    PERLBREW_ROOT: /Users/bruno/perl5/perlbrew
+    PERLBREW_HOME: /Users/bruno/perl5/perlbrew
+    PERLBREW_PATH: /Users/bruno/perl5/perlbrew/bin:/Users/bruno/perl5/perlbrew/perls/perl-5.30.1/bin
+    PERLBREW_MANPATH: /Users/bruno/perl5/perlbrew/perls/perl-5.30.1/man
+    
+COMMENT
+
+# List the recently available versions of perl on CPAN.
+perlbrew available
+
+
+# Removes all previously downloaded Perl tarballs and build directories.
+perlbrew clean
+
+# Show the version of perlbrew.
+perlbrew version
+
+<<COMMENT
+
+# Build and install the given versions of perl.
+perlbrew install [options] stable
+perlbrew install [options] blead
+perlbrew install [options] <version>
+# https://github.com/perl11/cperl
+perlbrew install [options] cperl-<version>
+
+    Options for "install" command:
+
+        -f --force     Force installation
+        -j $n          Parallel building and testing. ex. C<perlbrew install -j 5 perl-5.14.2>
+        -n --notest    Skip testing
+
+           --switch    Automatically switch to this Perl once successfully
+                       installed, as if with `perlbrew switch <version>`
+
+           --as        Install the given version of perl by a name.
+                       ex. C<perlbrew install perl-5.6.2 --as legacy-perl>
+
+           --noman     Skip installation of manpages
+
+           --thread    Build perl with usethreads enabled
+           --multi     Build perl with usemultiplicity enabled
+           --64int     Build perl with use64bitint enabled
+           --64all     Build perl with use64bitall enabled
+           --ld        Build perl with uselongdouble enabled
+           --debug     Build perl with DEBUGGING enabled
+           --clang     Build perl using the clang compiler
+           --no-patchperl
+                       Skip calling patchperl
+
+        -D,-U,-A       Switches passed to perl Configure script.
+                       ex. C<perlbrew install perl-5.10.1 -D usemymalloc -U versiononly>
+
+        --destdir $path
+                       Install perl as per 'make install DESTDIR=$path'
+
+        --sitecustomize $filename
+                       Specify a file to be installed as sitecustomize.pl
+ 
+ # Uninstalls the given perl installation.                      
+perlbrew uninstall <name>
+
+COMMENT