Add {% bootstrap %} tag that allows custom/grid layout of form fields

[vitalik]

This simple patch allows to set grid layout to form fields with the following usage:

{% bootstrap form %}
field1 field2 field3
field4 field5
{% endbootstrap %}

each line will be renderd as a .row div, and each field will take automatic .col-size

[vitalik]

is this project alive ?

[tzangms]

Hi @vitalik, sorry for the late reply,
cuz I got a baby last year, so most of my time was taking care of my baby,
but I will find time to looking at your PR. thanks for your PR

[vitalik]

Hi @tzangms
Maybe you should consider giving this repo to us (Code-on team) - we are using it heavily, and can do support/maintenance for this project