move defines from vim.h

buffer.h:
   buflist_getfile() flags
   buflist_new() flags
   buf_freeall() flags
   do_buffer() flags

charset.h:
   chartab[] flags

edit.h:
   in_cinkeys() flags
   change_indent() flags
   beginline() flags
   insertchar() flags
   nv_mousescroll() flags

eval.c
   AUTOLOAD_CHAR

eval.h:
   enum for vimvars[]

ex_cmds.h:
   do_ecmd
   read_viminfo flags

ex_cmds2.h:
   check_changed() flags
   do_source() flags

ex_cmds_defs.h:
   BAD_* flags

ex_docmd.h:
   VALID_PATH VALID_HEAD
   EXMODE_*
   do_cmdline() flags
added include

ex_getln.c
   *_ESC_CHARS definitions

ex_getln.h:
   history table flags - used by add_to_history()

fileio.h:
   readfile() flags
   event_T definition

getchar.h:
   ins_typebuf() flags
   KEYLEN_*

globals.h:
   NO_SCREEN
   NO_BUFFERS
   SEA_* defines
   current_SID flags
   hlf_T enum
   HL_FLAGS
   do_profiling() flags
   schar_T
   sattr_T

indent.h:
   set_indent() flags

macros.h:
   BINARY_FILE_IO flags

mbyte.h:
   MB_BYTE2LEN*
   ENC_*

memfile.h:
   mf_sync() flags

misc1.h:
   open_line() flags

message.h:
   do_dialog() flags
   vim_dialogyesno() flags
   DLG_BUTTON_*

normal.h:
   find_ident_under_cursor() flags

ops.h:
   do_put() flags
   operator ID's

option.h:
   buf_copy_options() flags
   OPT_* flags

os_unix.h:
   mch_nodetype() flags

quickfix.h:
   skip_vimgrep_pat() flags

regexp.h:
   vim_regcomp() flags
   values for reg_do_extmatch

search.h:
   do_search() flags
   search_regcomp() flags
   findmatchlimit() flags

syntax.h:
   HL_* flags
      HL_FOLD is used in buffer_defs.h but nvim
      compiles just fine with the defines in
      syntax.h

tag.h:
   do_tag() flags
   find_tags() flags

term.h:
   TBUFSZ flags
   MOUSE flags

ui.h:
   jump_to_mouse() flags

window.h:
   file_name_in_line() flags
   win_split() flags
   MIN_LINES
   MIN_COLUMNS

Remove VimClipboard which should have been removed with PR #921.
Merge #837 'Move defines from vim.h - phase2'
os/server: Fix indentation
os/server: Fix TCP connection

- remove unused errno
- remove unused port_end
- correct calculation of addr_len
- use correct string length during IP copy
os/server: Fix possible port overflow

- add documentation about port being optional
- parse port into long and check for valid value
Merge #874 'fix TCP connection (issue #870)'
os_open: impl mch_open with libuv. ref #133

- use return value instead of open_req.result
- libuv uv_fs_open() returns `-errno` instead of always -1
- libuv always sets open_req.result to the return value, _except_ for OOM
  where it only sets the return value. So always use the return value.
- replace calls to mch_open macro.
- update call sites expecting -1 error
os_open: add unit tests
Merge #846 'impl mch_open with libuv'
Use default busted pattern for unittests #943

- Unittest should contain substring '_spec' in filename.
- This is the simplest way to use both lua and moonscript tests.
- This prevents running of non-test scripts from test folder.
Use strict function prototypes #945

`-Wstrict-prototypes` warn if a function is declared or defined without
specifying the argument types.

This warning disallow function prototypes with empty parameter list.
In C, a function declared with an empty parameter list accepts an
arbitrary number of arguments when being called. This is for historic
reasons; originally, C functions didn't have prototypes, as C evolved
from B, a typeless language. When prototypes were added, the original
typeless declarations were left in the language for backwards
compatibility.
Instead we should provide `void` in argument list to state
that function doesn't have arguments.

Also this warning disallow declaring type of the parameters after the
parentheses because Neovim header generator produce no declarations for
old-stlyle prototypes: it expects to find `{` after prototype.
Temporary os_mkdtemp implementation. Use it instead of mkdtemp.
Remove HAVE_MKDTEMP

For now we provide simple `mkdtemp` for Windows, in the future we will
use libuv for that.
Remove USE_TMPNAM

tmpnam() is deprecated.
Remove #ifdefs TEMPDIRNAMES and add TEMPDIRNAMES for Windows

Vim does not define TEMPDIRNAMES for all systems, but it is defined for
all systems supported by Neovim.
Temporary directory names for Windows was obtained from GetTempPath()
function documentation at MSDN.
Additionally small renamings were performed.
Refactor vim_tempname

- temp_count is uint32_t now instead of long because it supposed to be
  at most 999999999 (comment on line 5227) temporary files. The most
  probably it was a long for compatibility with systems where int is
  16-bit.
- Use "nvim" as prefix for temp folder name instead of "v"
- Remove unused parameter from vim_tempname
Add vim_gettempdir(), remove global vim_tempdir

vim_gettempdir() and vim_maketempdir() was extracted from
vim_tempname().
Extract `tempfile` module from fileio

Though this module is relatively small it has very clear boundaries.
The last argument for extracting `tempfile` was the errors which I got
when I was writing unittests for it: `cimport './src/nvim/fileio.h'`
does not work for some reason.
tempfile.c: add tests
tempfile.c: add to clint-files and fix warnings