Emplace fixup

[monarchdodra]

Just a little series of "trivial" fixups related to my recent emplace fix.

This does not change any existing behavior, or try to fix anything that is broken. It is only mostly cleanup, removing un-needed code, rewrite error messages as cleaner format, as well as reword them a teensy-bit

Simpler to review each pull individually I think.

I'd rather these be fixed now, so I can tackle:

1. http://d.puremagic.com/issues/show_bug.cgi?id=10973
2. http://d.puremagic.com/issues/show_bug.cgi?id=10978
   So as to reduce the noise in pulls that actually change things.

[monarchdodra]

Stupid bug.

[monarchdodra]

Unfortunately, I had to remove that last commit, which was hitting some compiler bugs.

All that is left is some very trivial refactoring in emplace(chunk), as well as some error message rewrite.

[monarchdodra]

Yeah, I'd need this merged in. Its just some error message fixup, and removing un-needed code. THis is a prerequisite to fixing 10973, which is a reg.

https://github.com/monarchdodra/phobos/commit/6878466527aace6db6ef80801abb502f371973c1?w=1
https://github.com/monarchdodra/phobos/commit/fd8d7d537342872d71104067047672828f4fd42c
https://github.com/monarchdodra/phobos/commit/2d138c9eb96971b4c461305bdcfaf1721d984fe9

[denis-sh]

Probably I have to present my apologies to @monarchdodra.

Current situation is preposterous. He do what I did a long time ago but was blocked by misunderstanding with Phobos developers. I'd be happy to be able to talk with any of Phobos developers to clarify the situation. You know my e-mail. I always happy to contribute Phobos but it became a nightmare to me that time so I gave up. If anybody can give me about 15 minutes please do it.