vim-patch:7.4.261

Problem:  When updating the window involves a regexp pattern, an
          interactive substitute to replace a "\n" with a line
          break fails. (Ingo Karkat)

Solution: Set reg_line_lbr in vim_regsub() and vim_regsub_multi().

https://code.google.com/p/vim/source/detail?r=43c6cd07c8defd8505acbe479c6970764c08e6f9
Tests: prettify Makefile
vim-patch:7.4.260

Problem:  It is possible to define a function with a colon in the name.  It
          is possible to define a function with a lower case character if a
          "#" appears after the name.
Solution: Disallow using a colon other than with "s:".  Ignore "#" after the
          name.

https://code.google.com/p/vim/source/detail?r=6bc874e4789a0f912b4fd6b23afecf19d80b1605
Remove deprecated "--use-mirrors"

In newer versions of `pip`, it is obsolete. See the following relevant links.

https://pip.readthedocs.org/en/latest/news.html
https://github.com/eddyxu/cpp-coveralls/pull/37
replace some mch_stat() with os_file_exists()
use os_getperm in f_getfperm
rename buf_store_time to buf_store_file_info
implement os_file_get_size
implement FileInfo struct
replace some mch_stat with os_get_file_info