better level filenames and slightly less silly names for better usage

src/levels/index.js

@@ -2,28 +2,28 @@
 // a sequence proceed in the order listed here
 exports.levelSequences = {
   intro: [
-    require('../../levels/intro/1').level,
-    require('../../levels/intro/2').level,
-    require('../../levels/intro/3').level,
-    require('../../levels/intro/4').level
+    require('../../levels/intro/commits').level,
+    require('../../levels/intro/branching').level,
+    require('../../levels/intro/merging').level,
+    require('../../levels/intro/rebasing').level
   ],
   rampup: [
-    require('../../levels/rampup/1').level,
-    require('../../levels/rampup/2').level,
-    require('../../levels/rampup/3').level,
-    require('../../levels/rampup/4').level
+    require('../../levels/rampup/detachedHead').level,
+    require('../../levels/rampup/relativeRefs').level,
+    require('../../levels/rampup/relativeRefs2').level,
+    require('../../levels/rampup/reversingChanges').level
   ],
   rebase: [
-    require('../../levels/rebase/1').level,
-    require('../../levels/rebase/2').level
+    require('../../levels/rebase/manyRebases').level,
+    require('../../levels/rebase/selectiveRebase').level
   ],
   mixed: [
-    require('../../levels/mixed/1').level,
-    require('../../levels/mixed/2').level,
-    require('../../levels/mixed/3').level
+    require('../../levels/mixed/grabbingOneCommit').level,
+    require('../../levels/mixed/jugglingCommits').level,
+    require('../../levels/mixed/jugglingCommits2').level
   ],
   advanced: [
-    require('../../levels/advanced/1').level
+    require('../../levels/advanced/multipleParents').level
   ]
 };
 

src/levels/rampup/relativeRefs.js

@@ -3,7 +3,7 @@ exports.level = {
   "solutionCommand": "git checkout bugFix^",
   "startTree": "{\"branches\":{\"master\":{\"target\":\"C2\",\"id\":\"master\"},\"bugFix\":{\"target\":\"C4\",\"id\":\"bugFix\"}},\"commits\":{\"C0\":{\"parents\":[],\"id\":\"C0\",\"rootCommit\":true},\"C1\":{\"parents\":[\"C0\"],\"id\":\"C1\"},\"C2\":{\"parents\":[\"C1\"],\"id\":\"C2\"},\"C3\":{\"parents\":[\"C1\"],\"id\":\"C3\"},\"C4\":{\"parents\":[\"C3\"],\"id\":\"C4\"}},\"HEAD\":{\"target\":\"master\",\"id\":\"HEAD\"}}",
   "name": {
-    "en_US": "Everything is Relative"
+    "en_US": "Relative Refs (^)"
   },
   "hint": {
     "en_US": "Remember the Caret (^) operator!"

src/levels/rampup/relativeRefs2.js

@@ -6,7 +6,7 @@ exports.level = {
     "en_US": "You'll need to use at least one direct reference (hash) to complete this level"
   },
   "name": {
-    "en_US": "Flex your force with -f"
+    "en_US": "Relative Refs #2 (~)"
   },
   "startDialog": {
     "en_US": {