Visual D v1.4.0-rc3

Changes since rc2:

• fixed issue #282: mago now (mostly) calls __debug* methods asynchronously
• fixed issue #279: mago: display void[] as ubyte[] in the debugger
• fixed issue #281: mago: dereference pointer with '.' for arrays, too
• mago: fixed switching GC for funtion evaluation and adapted it to dmd 2.109
• updated to build with dmd-2.110
• fixed completion for fields/members of class/struct fields
• fixed crash if source window closed before semantic analysis callback completed
• dmdserver: log communication with Visual D to %TEMP%/dmdserver if that folder exists
• dmdserver: improve completion for code in switch statement
• dmdseerver: added option to display type size and alignment in tool tip
• added separate version of dbuild.dll linked against Microsoft.Build.CPPTasks.Common for VS 17.12