Ease building with custom includedir.
Fix pcre.h search path for custom build_includedir.
Supply backup file suffix for sed to make it work in OSX.
Fix deprecation in examples/lru.jl. Ref. #7332
Update examples/wordcount.jl. Ref. #7332

- Use `require` to load file on all processes
- Change file extension from ".j" to ".jl"
- Cosmetic changes to `for` loops, using `in` keyword for non-numeric
  iterables and using nested loop syntax
- Rename push -> push!, pop -> pop!
Remove all mention of timeit1 macro
Merge pull request #7316 from crayxt/master

Ease building with custom includedir.
- Zip2 iterator fix
- add a test for #7369
- fix spacing per @lindahua's suggestion.
Merge branch 'master' of https://github.com/swadey/julia