some design, data model, data migration script

DESIGN.md

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+
+# features
+
+* register
+* list
+* filter
+* stats panel
+* stats collector
+  * failure counter
+
+
+# MVP
+
+- [ ] homepage
+  - [ ] form to register an instance
+    - [ ] check for duplicates
+    - [ ] grab first stats : version, users, groups, events
+      - [ ] if fail, set failure to 1
+      - [ ] confirmation page
+  - [ ] instances list, no pagination
+  - [ ] abuse link
+- [ ] cron
+  - [ ] select instances where failure < max_failure
+  - [ ] for each entry, fetch stats
+      - [ ] if fail, set failure to failure+1
+      - [ ] if success, set failure = 0
+- [ ] stats page
+  - [ ] instances over time area chart
+  - [ ] users over time area chart
+  - [ ] events over time area chart
+  - [ ] groups over time area chart
+  - [ ] versions pie chart
+  - [ ] languages pie chart (user weighted ?)
+  - [ ] location pie chart
+
+
+# impl
+
+## stack
+
+1) sqlpage
+
+* webapp: sqlpage
+* cron : ?
+
+2) python web framework
+
+django / flask / microdot / webpy
+
+