update readme/thanks/todo with github markdown

CHANGES.md

@@ -0,0 +1,43 @@
+!NADA Changes
+
+0.9 - Thu Apr  4 14:51:06 BRT 2013
+----------------------------------
+
+* Added support for SQLite database.
+
+0.6 - Tue Jan 29 16:28:14 BRST 2013
+----------------------------------
+* Included script to clean-up database unnecessary old 
+  data
+
+0.5 - Wed Jan 23 17:54:23 BRST 2013
+----------------------------------
+* Fixed parsing of metrics that doesn't contain minimum
+  and maximum especified on perfdata
+
+0.4 - Thu Jan  3 20:27:33 BRST 2013
+----------------------------------
+* Added some memory allocation protections
+* Removed ugly homebrewed string copy function
+* Migrating from realloc() to calloc()
+* Using strncpy() instead of strcpy()
+* Added section `How to help?' into README file
+
+0.3 - Tue Aug 21 18:52:48 BRT 2012
+----------------------------------
+* Fixed float cast at tolerance calc
+* Added option to avoid boundary limit below zero
+* Added exponential smoothing as a valid algorithm to calcule
+  baselines
+* Now using NAGIOS_HOSTNAME and NAGIOS_SERVICEDESC at database
+  level
+
+0.2 - Mon Jul  9 21:07:55 BRT 2012
+----------------------------------
+* Splitted history table into two different entities to avoid
+  unneeded info replication
+* Added sazonality as a variable option
+
+0.1-alpha
+---------
+* Initial release