[ARM] Implement parse!real for systems with 64bit reals

and some unittest fixes
std.conv: Fix ambiguity when target has ctor and source has opCast
std.array: Allow joining constant arrays
The std.traits.ImplicitConversionTargets returns wrong result for dchar
fix 7069
some fix in std.traits.ImplicitConversionTargets
fix Issue 1832 - rebuilding ZipArchive looses data

- Already need to set compressedData slice when reading
  the directory index not only during expand.
remove templates
MT alignement
Move static asserts

So they trigger before they create a compile error
Add extra asserts on "w"
Document the rest of the parameters
Fix  Issue 11960 - Phobos Mersenne Random Engin...

...e not supporting unsigned longs
Add an MT unittest
Fix Issue 11830 - ByLine range length incorrect.

If you don't call `front` on a `ByLine` range then an extra line is reported. This change ensures the extra line is consumed when only calling `empty` without `front`.

https://d.puremagic.com/issues/show_bug.cgi?id=11830
Fix Issue 4725 - std.algorithm.sum()
Document use of Kahan vs. vanilla summation
Added LREF to sum in reduce
pairwise sum returns double for ranges with float elements
Remove first line laziness from ByLineImpl.