Add design for sql storage, implementation of db that stores the data, not retrieving yet.

experimental/webtry/TODO.md

Index: experimental/webtry/TODO.md
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+Public facing feature requests
+------------------------------
+ - return printf output
+ - permalinks for fiddles
+ - ability to render against multiple targets (gpu/cpu)
+ - versioning (which version of skia was this run against)
+ - serve up a iframe-able page
+ - magnifying glass (both client side and server side)
+ - specify scale, rotate, clip (possibly animating over a range)
+ - change canvas size from 300x300 to other sizes
+
+
+Implementation details
+----------------------
+ - Add flag for inout directory to webtry.go.
+ - In webtry.go add mutexes per hash, to avoid conflicts of writing the same file at the same time.
+ - Don't allow #macros in user code.
+ - Limit the size of the user code submitted.
+ - Add font support in the c++ template.
+ - Add inline links to doxygen.
+ - Add monitoring and probing (nagios).
+ - sanitize the file name in the output.