added PROJECTS file

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@34 a5681a0c-68f1-0310-ab6d-d61299d08faa

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+NEW RRD DATAFORMAT with Accessor Functions
+==========================================
+
+Interested:
+
+Tobias Oetiker <oetiker@ee.ethz.ch>
+Jake Brutlag <jakeb@microsoft.com>  
+- updating rrd_update to use accessor fks
+Karl Schilke <karl_schilke@eli.net> 
+- changeing data access to mmap
+
+
+Plan:
+
+Encapsulating access to the RRD files through
+special accessor functions which provide
+access to the datastructures within the
+RRDfiles. 
+
+pseudo code by Jake
+
+For example, here is a current code block from rrd_update.c:
+
+        for (i=0;i<rrd.stat_head->ds_cnt;i++) {
+        if(isnan(pdp_new[i]))
+            rrd.pdp_prep[i].scratch[PDP_unkn_sec_cnt].u_cnt += interval;
+        else
+            rrd.pdp_prep[i].scratch[PDP_val].u_val+= pdp_new[i];
+          }
+
+This could read:
+
+        for (i=0 ; i < getDSCount(&rrd) ;i++) {
+        if(isnan(pdp_new[i])) {
+            temp = getPDPParam(&rrd, i, PDP_unkn_sec_cnt);
+            temp.u_cnt += interval;
+            setPDPParam(&rrd, i, PDP_unkn_sec_cnt, temp);
+        } else {
+            temp = getPDPParam(&rrd, i, PDP_val);
+            temp.u_val += pdp_new[i];
+            setPDPParam(&rrd, i, PDP_val, temp);
+        }
+          }
+
+
+