Merge branch '102-enterinformation-of-type-int-accepts-44-and-44-000-as-valid-integer-notations' into 'master'

Fix allowDecimal in NumberField

Closes #102

See merge request !78

In the old implementation the NumberField object was assigned to by both
DecimalField and IntegerField letting the allowDecimal in DecimalField
overrule the allowDecimal in IntegerField. Now they both are their own
clones of NumberField.

implemented dynamic change of choice/options for dropdown, checkgroup,…

Closes #127

See merge request !74

Change the NoUserInterface implementation to always emit NoChange

Closes #154

See merge request !76

implemented dynamic change of choice/options for dropdown, checkgroup, choicelist & grid UI controls

support multiple selection for dropdown

Closes #88

See merge request !69

fix 122, added optionality to date, time and datetime editors

Closes #122

See merge request !67

Put the tictactoe images back

Closes #106

See merge request !70

Fix missing finish icon

Closes #115

See merge request !68

Export json(en|de)code for dynamics and -> in iTasks.dcl

Closes #66

See merge request !71

add doctype to html template

See merge request !72

This uses the same technique as with the list selection. It looks a bit
ugly but it is the standard multiselect <select> rendering from the
browser.

Closes #115

fix 144, persistTasks only affects tasks now

Closes #144

See merge request !66

Previously persistTasks affected regular shares as well, this fixes #144

Added some missing project files, and changed test runner tool to make it possible to integrate it in the nightly build scripts

Resolve "More combinators for building editors"

Closes #142

See merge request !63

# Conflicts:
#   Libraries/iTasks/Extensions/User.icl

First steps on a guide document

Closes #120

See merge request !62

fix optionality for user type

See merge request !64