* R/shiny-ui-cmpd.R(server_cmpd): New server function.

* R/shiny-ui-sets.R(server_sets): New server function.

* R/shiny-ui-top.R(mk_shinyscreen) <plugin-servers>: Add server_cmpd
  and server_sets.

* R/shiny-ui-top.R(mk_ui) <plugins>: New plugins cmpd, sets, gen.

Sorry :)

* R/shiny-ui-top.R(rv): Update rv definition.

* R/shiny-ui-top.R(launch): fnConf -> fn_conf

* R/mix.R(read_conf): New function.

* R/shiny-ui-base.R(conf2rv_conf): New function.
  In order to save config as yaml function, the reactive form of
  config must be converted to a list.

 (input$restoreConfB): New observer.

* R/shiny-ui-base.R(server_conf), R/shiny-ui-top.R(server): Now that
  we update rv inside server_conf, it must return it in some way.

Because we decided to split the server and UI definitions into
separate "modules", we also needed to create a way for different
modules to exchange their reactive values and functions.

In this regard, each module is going to have two server-like
functions, react_module-name_f and react_module-name_v, which will
define and return reactive functions and objects, respectively. Each
such function is server-like, i.e. it will take input, output and
session arguments. The two remaining arguments are rv and rf, for the
input reactive values and functions.

* R/shiny-ui-config.R(react_conf_v): New function.
  Add conf-related reactive values.

  (react_vonf_f): New function. Add conf-related reactive functions.

  (server_conf): Update observers.

* R/shiny-ui-top.R(server): Adapt to the new concept.

* R/shiny-ui-config.R: New file.
  It will contain everything related to the configuration tab of the
  former shinyUI.R

* R/shiny-ui-top.R: Updated with the config plug-in.

* DESCRIPTION: Updated.

* R/shinyUI.R: Removed.
  A monolithic file that became difficult to maintain.

* R/shiny-ui-top.R: New file. Contains top-level server and interface
  functions.

(mk_ui): New function. Replace old mkUI and serve as a top-level user
interface definition function.

(mk_shinyscreen): Removed most of it. Only the top-level content
remains.

* DESCRIPTION: Updated.

* R/shiny-ui-base.R: New file. Shiny wrappers.