Set version to 0.7. Update CHANGES.

CHANGES

@@ -1,3 +1,10 @@
+btpd-0.7:
+---------
+
+Bug fixes:
+- Some communication stupidities was fixed, resulting in better download
+  performance.
+
 btpd-0.6:
 ---------
 

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT(btpd, 0.6, btpd@murmeldjur.se)
+AC_INIT(btpd, 0.7, btpd@murmeldjur.se)
 
 AM_INIT_AUTOMAKE([foreign])