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, 40 insertions, 0 deletions

diff --git a/src/version_defs.h b/src/version_defs.h
new file mode 100644
index 0000000000..ee49a6d97c
--- /dev/null
+++ b/src/version_defs.h
@@ -0,0 +1,40 @@
+/* vi:set ts=8 sts=4 sw=4:
+ *
+ * VIM - Vi IMproved		by Bram Moolenaar
+ *
+ * Do ":help uganda"  in Vim to read copying and usage conditions.
+ * Do ":help credits" in Vim to see a list of people who contributed.
+ */
+
+/*
+ * Define the version number, name, etc.
+ * The patchlevel is in included_patches[], in version.c.
+ *
+ * This doesn't use string concatenation, some compilers don't support it.
+ */
+
+#define VIM_VERSION_MAJOR                7
+#define VIM_VERSION_MAJOR_STR           "7"
+#define VIM_VERSION_MINOR                4
+#define VIM_VERSION_MINOR_STR           "4"
+#define VIM_VERSION_100     (VIM_VERSION_MAJOR * 100 + VIM_VERSION_MINOR)
+
+#define VIM_VERSION_BUILD                280
+#define VIM_VERSION_BUILD_BCD           0x118
+#define VIM_VERSION_BUILD_STR           "280"
+#define VIM_VERSION_PATCHLEVEL           0
+#define VIM_VERSION_PATCHLEVEL_STR      "0"
+/* Used by MacOS port should be one of: development, alpha, beta, final */
+#define VIM_VERSION_RELEASE             final
+
+/*
+ * VIM_VERSION_NODOT is used for the runtime directory name.
+ * VIM_VERSION_SHORT is copied into the swap file (max. length is 6 chars).
+ * VIM_VERSION_MEDIUM is used for the startup-screen.
+ * VIM_VERSION_LONG is used for the ":version" command and "Vim -h".
+ */
+#define VIM_VERSION_NODOT       "vim74"
+#define VIM_VERSION_SHORT       "7.4"
+#define VIM_VERSION_MEDIUM      "7.4"
+#define VIM_VERSION_LONG        "VIM - Vi IMproved 7.4 (2013 Aug 10)"
+#define VIM_VERSION_LONG_DATE   "VIM - Vi IMproved 7.4 (2013 Aug 10, compiled "