Remove log noise.
Avoid "linking" static library targets against dependencies. Fixes #199.
Put linker flags (including "libs") after linker "sourceFiles". See #199.

Supposedly fixes an issue where a dependency that was build as a static library cannot access symbols of an external library that it needs, because the external library is passed to the linker before the dependency itself.
Add --no-as-needed to avoid linker errors with new GCC versions used as the linker front end. See #199.
Determine proper module name for "package.d" files and "dub test". Fixes #198.