Removes 'proto' dir

See #137 for the issue.

Every header in the proto directory was:

* Given include guards in the form

    #ifndef NEOVIM_FILENAME_H
    #define NEOVIM_FILENAME_H
        ...
    #endif /* NEOVIM_FILENAM_H */

* Renamed from *.pro -> *.h
* Moved from src/proto/ to src/

This would have caused conficts with some existing headers in src/;
rather than merge these conflicts now (which is a whole other can of
worms involving multiple and conditional inclusion), any header in src/
with a conflicting name was renamed from *.h -> *_defs.h (which may or
may not actually describe its purpose, the change is purely a
namespacing issue).

Once all of these changes were made a script was developed to determine
what #includes needed to be added to each source file to describe its
dependencies and allow it to compile; because the script is so short
and I'll just list it here:

    #! /bin/bash

    cd $(dirname $0)

    # Scrapes `make` output for provided error messages and outputs #includes
    # needed to resolve them.
    #   $1 : part of the clang error message between filename and identifier
    list_missing_includes() {
        for file_missing_pair in $(CC=clang make 2>&1 >/dev/null | sed -n "s/\/\(.*\.[hc]\).*$1.*'\(.*\)'.*/\1:\2/p"); do
            fields=(${file_missing_pair//:/ })
            source_file=${fields[0]}
            missing_func=${fields[1]}
            # Try to find the declaration of the missing function.
            echo $(basename $source_file) \
                \#include \"$(grep -r "\b$missing_func __ARGS" | sed -n "s/.*\/\(.*\)\:.*/\1/p")\"
        # Remove duplicates
        done | sort | uniq
    }

    echo "Finding missing function prototypes..."
    list_missing_includes "implicit declaration of function"
    echo "Finding missing identifier declarations..."
    list_missing_includes "use of undeclared identifier"

Each list of required headers was added by hand in the following format:

    #include "vim.h"
    #include "*_defs.h"
    #include "filename.h"
    /* All other includes in same module here, in alphabetical order. */
    /* All includes from other modules (e.g. "os/*.h") here in alphabetical
     * order. */

1 files changed, 24 insertions, 0 deletions

diff --git a/src/hardcopy.h b/src/hardcopy.h
new file mode 100644
index 0000000000..84cbe02be8
--- /dev/null
+++ b/src/hardcopy.h
@@ -0,0 +1,24 @@
+#ifndef NEOVIM_HARDCOPY_H
+#define NEOVIM_HARDCOPY_H
+/* hardcopy.c */
+char_u *parse_printoptions __ARGS((void));
+char_u *parse_printmbfont __ARGS((void));
+int prt_header_height __ARGS((void));
+int prt_use_number __ARGS((void));
+int prt_get_unit __ARGS((int idx));
+void ex_hardcopy __ARGS((exarg_T *eap));
+void mch_print_cleanup __ARGS((void));
+int mch_print_init __ARGS((prt_settings_T *psettings, char_u *jobname,
+                           int forceit));
+int mch_print_begin __ARGS((prt_settings_T *psettings));
+void mch_print_end __ARGS((prt_settings_T *psettings));
+int mch_print_end_page __ARGS((void));
+int mch_print_begin_page __ARGS((char_u *str));
+int mch_print_blank_page __ARGS((void));
+void mch_print_start_line __ARGS((int margin, int page_line));
+int mch_print_text_out __ARGS((char_u *p, int len));
+void mch_print_set_font __ARGS((int iBold, int iItalic, int iUnderline));
+void mch_print_set_bg __ARGS((long_u bgcol));
+void mch_print_set_fg __ARGS((long_u fgcol));
+/* vim: set ft=c : */
+#endif /* NEOVIM_HARDCOPY_H */