modernize travis.yml, fix build

- modernize travis.yml
- disable Logging
- provide empty `@threads` macro on Julia v0.4

.travis.yml

@@ -1,17 +1,14 @@
-language: cpp
-compiler:
-  - clang
+# Documentation: http://docs.travis-ci.com/user/languages/julia/
+language: julia
+os:
+  - linux
+  - osx
+julia:
+  - release
+  - nightly
 notifications:
   email: false
-env:
-  matrix: 
-    - JULIAVERSION="juliareleases" 
-    - JULIAVERSION="julianightlies" 
-before_install:
-  - sudo add-apt-repository ppa:staticfloat/julia-deps -y
-  - sudo add-apt-repository ppa:staticfloat/${JULIAVERSION} -y
-  - sudo apt-get update -qq -y
-  - sudo apt-get install libpcre3-dev julia -y
-script:
-  - julia -e 'Pkg.init(); run(`ln -s $(pwd()) $(Pkg.dir("JuliaRecSys"))`); Pkg.pin("JuliaRecSys"); Pkg.resolve()'
-  - julia -e 'using JuliaRecSys; @assert isdefined(:JuliaRecSys); @assert typeof(JuliaRecSys) === Module'
+# uncomment the following lines to override the default test script
+#script:
+#  - if [[ -a .git/shallow ]]; then git fetch --unshallow; fi
+#  - julia -e 'Pkg.clone(pwd()); Pkg.build("RecSys"); Pkg.test("RecSys"; coverage=true)'

src/RecSys.jl

@@ -31,6 +31,9 @@ if (Base.VERSION >= v"0.5.0-")
 using Base.Threads
 type ParThread <: Parallelism end
 export ParThread
+else
+macro threads(x)
+end
 end
 
 include("input.jl")
@@ -39,10 +42,10 @@ include("als-wr.jl")
 include("utils.jl")
 
 # enable logging only during debugging
-using Logging
-#const logger = Logging.configure(filename="recsys.log", level=DEBUG)
-const logger = Logging.configure(level=DEBUG)
-logmsg(s) = debug(s)
-#logmsg(s) = nothing
+#using Logging
+##const logger = Logging.configure(filename="recsys.log", level=DEBUG)
+#const logger = Logging.configure(level=DEBUG)
+#logmsg(s) = debug(s)
+logmsg(s) = nothing
 
 end