Add megatools package

packages/megatools.rb

+require 'package'
+
+class Megatools < Package
+  description 'Megatools is a collection of programs for accessing Mega.nz service from a command line of your desktop or server.'
+  homepage 'https://megatools.megous.com/'
+  version '1.9.98'
+  source_url 'https://megatools.megous.com/builds/megatools-1.9.98.tar.gz'
+  source_sha256 '9b0521a4d27dbc417fc8e12610ac1e1da729bf6d6eb5bef927ef3670b372a16f'
+
+  depends_on 'asciidoc'
+
+  def self.build
+    system './configure'
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end