Fixed c stuff so it actually works and included extra words in the manisfest

MANIFEST.in

@@ -1,2 +1,3 @@
+include wordscape/extra_words.txt
 include requirements.txt
 recursive-include src *

src/c_fits.c

@@ -1,28 +1,30 @@
-int _fits(char* bottom, int len_bottom, char* top, int len_top) {
-    int bottom_letters[26];
-    int top_letters[26];
+int _fits(char * bottom, int len_bottom, char * top, int len_top) {
+    int bottom_letters[26] = {
+        0
+    };
+    int top_letters[26] = {
+        0
+    };
     int letter_val;
     int i;
     for (i = 0; i < len_bottom; i++) {
-        letter_val = bottom[i]-96;
+        letter_val = bottom[i] - 97;
         if (0 <= letter_val && letter_val <= 25) {
             bottom_letters[letter_val] += 1;
+        } else {
+            return 0;
         }
-	else {
-	    return 1;
-	}
     }
     for (i = 0; i < len_top; i++) {
-        letter_val = top[i]-96;
+        letter_val = top[i] - 97;
         if (0 <= letter_val && letter_val <= 25) {
             top_letters[letter_val] += 1;
+        } else {
+            return 0;
         }
-	else {
-	    return 1;
-	}
     }
-    for (i = 0; i < 26; i++ ) {
-        if (bottom_letters[i] < top_letters) {
+    for (i = 0; i < 26; i++) {
+        if (bottom_letters[i] < top_letters[i]) {
             return 0;
         }
     }

src/fits.pyx

@@ -3,4 +3,4 @@ cdef extern from "c_fits.c":
 
 
 cpdef bint fits(str bottom, str top):
-    return _fits(bottom.encode(), len(bottom), top.encode(), len(top)) == 0
+    return _fits(bottom.encode(), len(bottom), top.encode(), len(top)) == 1