fixes if / eq / is re-rendering

Fixed #596

scope/key docs

v4.12.0

4.12.0

for(of) gets scope.index and for(items) works

bba5f68

{{# for(items) }}
  {{scope.index}}
{{/ for}}

The above works.

for(of) produces observable scopes

#594

Makes this sorta thing work:

    {{# for(thing of this.stuff)}}
       {{let theValue=null}}
       <driver-list selected:to="theValue" on:click='fooName = 3'/>
			 <driver-edit driver:from="theValue"/>
    {{/ for}}

Custom scopes get a let context

#592 (review)

First versions of {{for(in)}} and {{let}} helpers

#583

Fixes arguments passed to helpers and adds `addConverter` docs

PR #582

Fixes bug with bracket expression used after a call expression

v4.10.4

4.10.4

Fixes bug with bracket expression used after a call expression

v3.14.22

3.14.22

Address minor documentation issues #504 #429

Renamed Template Acquisition to something simpler 'Loading Templates'
Removed outdated documentation.