LDC 1.5.0

[kinke]

Hi everyone,

on behalf of the LDC team, I'm glad to finally officially 
announce LDC 1.5. The highlights of this version in a nutshell:

* Based on D 2.075.1.
* Polished LLVM 5.0 support (now also used for the prebuilt 
release packages).
* Prebuilt ARM-Linux package available again.
* New command-line option `-linker` and ~25 new advanced ones for 
codegen fine-tuning.
* Bugfixes, as always.

Full release log and downloads: 
https://github.com/ldc-developers/ldc/releases/tag/v1.5.0

Thanks to all contributors!

[LDC master is at v2.076.1, so LDC 1.6 won't take long.]