Moved more functions from misc1.c to indent.c
Add unit tests for mch_[gs]etperm.

Use preprocessor trick proposed by @mahkoh to import 'defines' like
S_IRUSR.
Move and refactor mch_[gs]etperm to os/fs module.
Revive vim_fname (-> os_file_exists); fix misuse of mch_getperm.

* Move vim_fname from misc1 to os/fs:os_file_exists.
* Add unit tests for os_file_exists.
* Replace misuse of mch_getperm with os_file_exists.
minimize readme
Issue #311 - Clean up blowfish.c/h, charset.c/h, diff.c/h, digraph.c/h, garray.c/h, hashtab.c/h, popupmnu.c/h, sha256.c/h, version.c/h. Update uncrustify to move logical operators to the beginning of the line when splitting. Also, clean up arabic.c/h and farsi.c/h
Revamp the build system.

This achieves several goals:

 * Less reliance on scripts so we have better portability to Windows
   (though we still have a ways to go for proper Windows support).
   Luajit, luarocks, moonscript, and busted are all installed via CMake
   now.
 * Trying to make use of pkg-config to get the correct libraries.  The
   latest libuv is still broken in this regard, but we'll at least be in
   a position to use it.
 * Allow the use of Ninja or make.  The former runs faster in many
   environments, and automatically makes use of parallel builds.

This also allows for system installed dependencies--though not through
the Makefile just yet--and adds support for FreeBSD.

This also make us build libuv and luajit as static libraries only, since
we're only concerned about having static libraries for our bundled
dependencies.
Deal with the missing dependencies for libuv.

Since libuv.pc is broken at the moment, try to determine libuv's
dependencies ourselves.  This ports most of the checks from libuv into
our CMake build, and fixes the build on other unix platforms.
Workaround the broken progress feedback in some versions of CMake.

Underneath the hood, CMake uses libcurl and libcurl has had a number of
issues regarding progress feedback.  In one sample run against Travis
CI, we ended up with nearly 3,000 lines of progress output for a single
download.

Unfortunately, CMake doesn't have the download and extract steps
separate, so we have some extra work that we have to do.  Much of the
content was taken from the ExternalProject.cmake and it's template for
generating the content of the download and extract CMake files.