refine comment

The constructors in each object file get merged during linking
so it's better to speak of shared libraries and executables
instead of object files.
print more information for tests

- OK or FAIL
- exception message (traceback) for failures
- test duration (in ms)
remove entrypoint.d
Subsidiary fix for issue 6210.

Add builtin typeinfo for const(char)[] so that it will use the same hash
function as char[] and string.
Merge pull request #573 from quickfur/issue6210

Subsidiary fix for issue 6210.
Merge pull request #572 from WalterBright/remove-entrypoint

remove entrypoint.d
add implementation notes to dmain2.d
remove unused global variable
Merge pull request #577 from WalterBright/rm-unused-global

remove unused global variable
refactor src/rt/minfo.d
Merge pull request #568 from dawgfoto/betterTestRunner

print more information for tests
Merge pull request #575 from WalterBright/add-dll-notes

add implementation notes to dmain2.d
Merge pull request #578 from WalterBright/refactor-minfo

refactor src/rt/minfo.d
tweak message
Merge pull request #579 from monarchdodra/tweakRunner

tweak test_runner message
Merge pull request #556 from dawgfoto/refineComment

refine comment
Merge remote-tracking branch 'upstream/master'