Add parameter support

[alexdraconian]

Replaces #267

Add mediawiki-like parameter support. Since original branch("template" branch) is far behind from present, I just implemented template functionality myself.

1. Added "{{{name}}}" syntax as placeholders. This syntax will be hidden on render.
   Example: {{{1}}}, {{{2}}}, {{{some_name}}}

2. Parameter syntax is like this:
   {{page>pagename#section&parameters=param1|param2|param3...}}
{{page>pagename#section&parameters=name1=param1|name2=param2|name3=param3...}}

Wiki syntax can be used as parameter value.

vertical bar can be escaped with backslash. like this:
{{page>pagename?parameters=value\|with\|vertical bar|this is value 2}}
Which resolves to:
{{{1}}} -> value|with|vertical bar
{{{2}}} -> this is value 2

When name is not provided, they will be automatically resolved as integer names - 1, 2, 3, so on.

Wiki syntax can be used with parameter.

{{page>pagename?parameters=[[link\|some link]]}}
Which resolves to:
{{{1}}} -> [[link|some link]] (Rendered as internal wiki link)