issue 5224
fix Issue 10125 Unicode non-BMP decoding to dchar in stdio readln

strings were first decoded to wchars, each wchar was then separately
decoded to dchar, resulting in 2 dchars in the surrogate block instead
of 1 correct dchar.

added unit test to verify readln decoding of non-ASCII characters
Merge branch 'master' of github.com:D-Programming-Language/phobos into 5224
@blackwhale's review
@blackwhale's destruction
combine some statements
Fix std.traits for large input

std.traits: EnumMembers, isExpressionTuple, isTypeTuple & Largest balks
at large input
Fix issues 8435, 10118.
Hack to make BigInt's typeinfo use the correct version of opCmp.
Use typeid.getHash instead of rt.util.hash.hashOf which is not
accessible from outside druntime.
EnumMembers now works with single-member enums.
Removed empty declarations. Converted more C-style array declarations to D-style. Removed trailing whitespace
Merge remote-tracking branch 'upstream/master'
More empty declarations
Reverted implicit string concatienation changes
Merge branch 'master' of https://github.com/D-Programming-Language/phobos
Don't move labeles while tired
Expand tab.
Fix @property annotations and incorrect parenthesis
Remove -property switch