Added section on acronyms to dstyle.dd.

It now explains what case to use with acronyms as it comes up fairly
often in reviews for new functionality. The rule follows what we've
mostly been doing and been insisting on during the review process.
Merge pull request #219 from jmdavis/dstyle

Added section on acronyms to dstyle.dd.
Make opEquals callable on const/non-const this reference and with const/non-const argument.
Merge pull request #220 from AndrejMitrovic/opEqualsFix

Make opEquals callable on const/non-const this reference and with const/non-const argument
Fixes Issue 9180 - Fix outdated ASM example.
Merge pull request #221 from AndrejMitrovic/Fix9180

Issue 9180 - Fix outdated ASM example.
followup to Issue 9180
D structs are not always POD.
Relax inout rule

It has been introduced by issue 7105 from 2.059. In current, an inout is not necessary to appear in the return type.
Merge pull request #226 from 9rnsr/relax_inout_rule

Relax inout rule
Merge pull request #222 from klickverbot/pod-structs

D structs are not always POD.
Add documentation about attribute inference in inheritance.
Merge pull request #225 from 9rnsr/attr_infer_in_inheritance

Add documentation about attribute inference in inheritance.
Document 64bit registers and SIMD instructions
Add note about symbol names which match keywords.

If symbol's name would be a keyword, and it is undesirable to pick
another name, then the way to make it legal is to append an underscore
to it, which we've been doing. But apparently it didn't make it into the
style guide. So, this adds it.
Merge pull request #227 from jmdavis/dstyle

Add note about enum member names which match keywords.
Merge pull request #228 from Govelius/master

Update iasm docs
Merge branch 'master' into staging