[New, Update] Messy commit.

* [Update] Add module paths to watch files.  From the old Bitbucket repo, submitted by `MarkSill`.
* [Fix] Trim erroneous whitespace surrounding the story title.  From the old Bitbucket repo.
* [Update, Devel, Docs] Changed import and doc paths to point to the GitHub repo and removed Mercurial references.
* [Fix] Leading whitespace on passages is trimmed as intended.
* [New, Docs] Added an option to disable passage trimming (`--no-trim`).
* [Update] Update IFID commentary and cleanup.
* [Update] Switched to another SemVer module due to a few issues with the old one.
* [Update] Purged commented legacy & debug code.

story.go

@@ -9,6 +9,7 @@ package main
 import (
 	"fmt"
 	"log"
+	"strings"
 )
 
 // Twine 1 story metadata.
@@ -182,6 +183,8 @@ func (s *story) add(p *passage) {
 			log.Printf(`warning: Cannot unmarshal "StorySettings" special passage; %s.`, err.Error())
 		}
 	case "StoryTitle":
+		// Rebuild the passage contents to trim erroneous whitespace surrounding the title.
+		p.text = strings.TrimSpace(p.text)
 		s.name = p.text
 	}