fix Issue 9858 - const alias this fails when opAssign is present

Type::makeXXX had unintentionally taken over Type(Struct|Class)::att field.
VS: Update project files (add sapply.c)
VS2010: Fix x64 builds; clean up project file
VS2010: Soup up release build optimization options
Remove unused COFF union field, which breaks the struct on x64
Merge pull request #1828 from 9rnsr/fix9858

[REG2.063a] Issue 9858 - const alias this fails when opAssign is present
VS: Disable x64 assembler implementations of ld_readll and ld_readull

Fixes runnable/test42.d (testdbl_to_ulong)
VS: Fix formatting of integer doubles

Fixes compilable/xheader.d
VS: Fix number of zeroes in exponent

Fixes fail_compilation/diag9357.d
Merge pull request #1834 from CyberShadow/fixes-20130404

Visual Studio fixes