Collected clang args in ClangArgs.kt
Switched dependencies/build.gradle to KonanTarget.
Introduced KonanProperties to take care of target specific properties.
The libraries exist in two incarnations:
packed foo.klib and unpacked foo/ .
The compiler when given '-library foo' expects to find either
a foo.klib file and unpack it, or an already unpacked foo/ directory.
The stdlib is always unpacked in dist/klib .
The semantics of -o has changed slightly.
It now accepts '-o foo' and the compiler
either produces foo.kexe or foo.klib .
Alexander Shabalin