Specify shaders directly as arrays of bytes in source code.

This allows us to provide all functionality in executable file without providing additional data files.
Added bin2hex utility that does [spirv binary->cpp code] conversion.
Idea is based on vkQuake implementation.

tools/bin2hex.cpp

@@ -0,0 +1,40 @@
+#include <cstdint>
+#include <cstdio>
+
+int main(int argc, char* argv[]) {
+    if (argc != 3) {
+        printf("Usage: bin2hex <input_file> <output_array_name>\n");
+        return - 1;
+    }
+    FILE* f = fopen(argv[1], "rb");
+    if (!f) {
+        printf("Could not open file for reading: %s\n", argv[1]);
+        return -1;
+    }
+
+    const int line_length = 16;
+    long long size = 0;
+
+    printf("unsigned char %s[] = {\n\t", argv[2]);
+
+    int byte = fgetc(f);
+    while (byte != EOF) {
+        printf("0x%.2X", byte);
+
+        byte = fgetc(f);
+        if (byte != EOF) printf(", ");
+
+        size++;
+        if (size % line_length == 0) printf("\n\t");
+    }
+
+    printf("\n};\n");
+    printf("long long %s_size = %lld;", argv[2], size);
+
+    if (!feof(f)) {
+        printf("Could not read entire file: %s", argv[1]);
+    }
+
+    fclose(f);
+    return 0;
+}