Is it at all possible to add template fields in your content or will this need to be built on top of kirby?
For example, rather than have this in my content:
Hi Thank you for query please <a href="mailto:somemail@gmail.com">email me</a>
Is it possible to do
Hi Thank you for your query please {{email}}
And have it reference whatever I set {{email}} to?
You could create custom Kirby Tags
Also, there is an email Kirbytag which you can use as follows:
``text
(email: bastian@getkirby.com)
(email: bastian@getkirby.com text: Send me an email)
(email: bastian@getkirby.com text: Send me an email title: Contact me)
(email: bastian@getkirby.com text: Send me an email class: email)
Or better still, you can use Kirbytext filters: http://getkirby.com/docs/advanced/kirbytext
Cool, thanks for the answers! 
Yes, I know that is late, but you can also use a filter like this:
/**
* Adds support for use placeholders like {foo} in your fields
*
* <code>
*
* $placeholders = array(
* 'foo' => 'value',
* 'bar' => 'value',
* );
*
* echo $page->yourfield()->template($placeholders)->kirbytext();
*
* </code>
*
* @param Field $field The calling Kirby Field instance
* @param Array $array A key/value array
* @author fenixkim
*/
field::$methods['template'] = function($field, $array) {
$field->value = str::template($field->value, $array);
return $field;
};