Alex-approved coverage updates

Author: staticfloat

.travis.yml

@@ -12,4 +12,4 @@ git:
 
 # Submit to Codecov  
 after_success:
-   - julia -e 'cd(Pkg.dir("NNlib")); Pkg.add("Coverage"); using Coverage; Codecov.submit(process_folder())'
+   - julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(process_folder())'

appveyor.yml

@@ -42,4 +42,4 @@ test_script:
 #   - C:\julia\bin\julia -e "%JL_CODECOV_SCRIPT%"
 
 after_test:
-  - C:\julia\bin\julia -e "cd(Pkg.dir(\"NNlib\")); Pkg.add(\"Coverage\"); using Coverage; Codecov.submit(process_folder())"
+  - C:\julia\bin\julia -e "using Pkg; Pkg.add(\"Coverage\"); using Coverage; Codecov.submit(process_folder())"