Add a new DAWG format.

Make reader and writer for the new format, while
maintaing compatibility with the old.  Things to
note of the new format...

* Now has a header, with version number, MD5, and word count.
* No longer has terminator bit.  Nodes are terminated by
a non-zero playability.
* Which means letters have one more bit.  So we can now
support more than 32 letters.  Important for Slovak alphabet.

Also, various cleanups and refactorings.

1 files changed, 1 insertions, 0 deletions

diff --git a/fixedstring.h b/fixedstring.h
index 46d1011..e8db0bf 100644
--- a/fixedstring.h
+++ b/fixedstring.h
@@ -54,6 +54,7 @@ class FixedLengthString
     size_type size() const { return length(); }
     void clear() { m_end = m_data; }
     void push_back(char c);
+    const char* constData() const { return m_data; }
 
     int compare(const FixedLengthString& s) const;