Update svelte based packages to use sapper

[xmonader]

as sapper provides lots of functionality out of the box I suggest upgrading all the svelte based packages to sapper

• [x] myjobs
• [x] alerta
• [x] pastebin
• [x] docs update

[abom]

Updated and fixed myjobs and alerta (with docs), @xmonader did pastebin.

[Pishoy]

verified

JSX> cl = j.servers.threebot.local_start_default(web=True)                                                                                                                                                  
JSX> cl.actors.package_manager.package_add(path='/sandbox/code/github/threefoldtech/jumpscaleX_threebot/ThreeBotPackages/zerobot/alerta')                                                                   

JSX> cl.actors.package_manager.package_add(path='/sandbox/code/github/threefoldtech/jumpscaleX_threebot/ThreeBotPackages/zerobot/myjobs')                                                                   
b'OK'

JSX> cl.actors.package_manager.package_add(path='/sandbox/code/github/threefoldtech/jumpscaleX_threebot/ThreeBotPackages/demo/pastebin')                                                                    
b'OK'

• jsx version

  
  3BOTDEVEL:jsx:jumpscaleX_threebot: git log -1
  commit 52fe85a76e30b8343bc4247e3585891199041dfd (HEAD -> development, origin/development, origin/HEAD)
  Author: serboctor <boctor.sarah@gmail.com>
  Date:   Mon Nov 4 11:13:14 2019 +0200
  
  Update README.md