* R/shiny-ui-base.R, NAMESPACE:
  importFrom(shiny,validate) now correct.

* R/shiny-ui-base.R(volumes): Attach the current working directory.

R/shiny-ui-base.R(volumes): New function.

The result for shinyFiles::getVolumes().

* R/shiny-ui-base.R(validate,validate1):

Function validate changed back to shiny original. Introduced validate1
when there is no need for `need'.

* 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.

* R/shiny-ui-base.R(obsrv_e,validate,vol_f): New wrappers.

* R/shiny-ui-config.R(saveConfB): Change default filename and
  filetype.

* R/shiny-ui-config.R(input$saveConfB): New observer.

* R/shiny-ui-base.R(react_v,react_f,react_e, obsrv, vols): New
  functions.
  Wrap functions that are used a lot.

* R/shiny-ui-base.R(path2vol): New function.

* 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.