Capitalize and add anchors to headers in grammar.dd
Merge pull request #498 from JakobOvrum/grammaranchors

Capitalize and add anchors to headers in grammar.dd
Improve ddoc source style of template.dd

Proper indentation for paragraphs and code blocks will make ddoc source more human-readable.
typedef is deprecated in D2
fix Issue 3467 - Non-int integral template parameters not correctly propagated
fix Issue 2025 - Inconsistent rules for instantiating templates with a tuple parameter