Upgrade exercises to work in v0.7/v1.0

[SaschaMann]

This should make all exercises and examples work on v0.7.

However, I'm having issues porting runtests.jl that I need help with. The previous way of running all exercise tests in a separate module doesn't work but I can't find enough information about the changes to include that prevent the old way from working.

The problematic line:
eval(Module(), :(include(joinpath($temp_path, "runtests.jl"))))

This throws the error

anagram example: Error During Test at /home/travis/build/exercism/julia/runtests.jl:34
  Got exception UndefVarError(:include) outside of a @test
  UndefVarError: include not defined
  Stacktrace:
   [1] top-level scope at none:0
   [2] eval at ./boot.jl:319 [inlined]
   [3] eval(::Module, ::Expr) at ./deprecated.jl:55
   [4] macro expansion at /home/travis/build/exercism/julia/runtests.jl:37 [inlined]
   [5] macro expansion at /buildworker/worker/package_linux64/build/usr/share/julia/stdlib/v1.0/Test/src/Test.jl:1079 [inlined]
   [6] top-level scope at /home/travis/build/exercism/julia/runtests.jl:37 [inlined]
   [7] top-level scope at ./none:0
   [8] include at ./boot.jl:317 [inlined]
   [9] include_relative(::Module, ::String) at ./loading.jl:1040
   [10] include(::Module, ::String) at ./sysimg.jl:29
   [11] exec_options(::Base.JLOptions) at ./client.jl:235
   [12] _start() at ./client.jl:428

The dep warning says the following: Warning: `eval(m, x)` is deprecated, use `Core.eval(m, x)` instead. but changing that doesn't change the error above.

This could be fixed by running them in a separate Julia process, but that's not really a nice solution. I'm at a loss here on how to fix this.