Fix Issue 10297 - Memory safe D spec is out of date

Link to spec from front page instead of safed.html article.
Replace 'Proscribed Forms' section with link to @safe function
attribute.
Introduce @safe, @trusted.
Add note about array bounds checks.
Remove unimplemented -safe switch
List a few examples of unsafe operations
fixed little typo
Merge pull request #602 from UplinkCoder/patch-1

fixed little typo
Add download links for LDC release 0.13.0
Add new version identifiers.

Epiphany was added in 2.064.2 and NVPTX/NVPTX64 in 2.066.
Merge pull request #604 from redstar/version

Add new version identifiers.
Merge pull request #603 from redstar/ldc2-0.13.0

Add download links for LDC release 0.13.0
Update pretod.dd

Enum is a better replacement for #define than const is.
Merge pull request #606 from Hackerpilot/patch-1

Update pretod.dd
Issue 12273 - Added documentation for -color[=on|off] flag
Merge pull request #605 from lionello/color

Added documentation for -color
Fix misspelling of publicly.
Merge pull request #607 from jmdavis/publicly

Fix misspelling of publicly.
http for links to gdcproject.org missing
Merge pull request #608 from schuellerf/patch-1

http for links to gdcproject.org missing
Update beta announcement and correct video links

Links to video for DConf 2014 incorrect. Update announcement to reflect availability of v2.066.0-b1.
Insert link to beta announcement.
Merge pull request #600 from ntrel/update-safe-spec

Fix Issue 10297 - Memory safe D spec is out of date