fixes issues 33 & 31

Page should always "refresh" on click of menu item
Show "Please wait" on form submit
improved last commit, issue 33

Page should always "refresh" on click of menu item: basic init of App.MainView only, if this view is not already present
issue #33: last fix caused trouble with normal page chengaes

solution: added extra parameter "isReload" to App.loadPageInfoFromServer: if not set, App.MainView will be created anew.
Add fallback code for old mason ui for workflow probing
New generic validators Connector and Regex
Add validators for metadata workflow
Remove email formater (not implemented yet)
clonable fields

issue #7
clonable fields: init value, little fix

issue #7
datepicker, first beta

issue #26
date-field: more input and output formats

input: "yyyy-mm-dd ..." is correctly parsed
output: epoch, terse, printable, iso8601

issue #26
Merge remote-tracking branch 'dsiebeck/feature/webui' into feature/webui
enhancement for clonable fields

add/remove icons always at the end of the field line
no additional line inserted
Merge remote-tracking branch 'dsiebeck/feature/webui' into feature/webui
positioning of add/remove buttons for clonable fields improved

issue #7
Merge remote-tracking branch 'dsiebeck/feature/webui' into feature/webui
Add some more magic glue for multivalue fields in metadata

Fiels in the metadata workflow can now be marked multivalued
which lets the new ui render cloneable fields. The class can also
transition from scalar values to multivalues when loading the
initial metadata fro the table as the issuance wfl usually only write
a single item (e.g. mail)
Change back server url
Redirect the browser on workflow creation to have a nice url
Add magic for handling multivalued workflow fields