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darcs-hash:36dd633bacd319a77a5ca66a899fafc52e27f1bf

support overflow on nsec value in encode-local-time, fix tests and add a TODO whether it's ok to overflow at all anywhere

darcs-hash:9ac38bcee3fc3a9f4fe2eeeeb5365c0c595277d7

darcs-hash:bd91e7496e28031150dc333aaabd0aa456757d8a

darcs-hash:dbdbd575aeda5d2857a0b100157e4c4758143f94

darcs-hash:8d5134ea7bf24653efe678c6d295b07de05968db

optimize format-timestring, add some ftype's and reorder definitions, bind *print-pretty* and friends to nil

darcs-hash:aa3881ec81b2544e12d356bf45d58ea3090cdce0

darcs-hash:ce11c654c4c3e5cf7020a026ab59fbb52ca4cb98

e.g. (parse-timestring "2008-02-20T16:56:28.940703Z")  => @2008-02-20T16:56:28.-133039Z
when most-positive-fixnum is 536870911

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darcs-hash:c3e2fab6c10f684fbaea4df56b7f93833894d35f

reorder some definitions to load it cleanly, add an eval-when, too (splitting into multiple files would help, too)

darcs-hash:151f5ee802c111c1b5845aef2c211419d48d96dd

- fix gregorian leap year rules: 100 and 400 years rules were not taken
  into account which broke timestamps when using cl-postgres and year far
  enough from now.

- added adjust-local-time, and adjust-local-time! (which sideeffects the
  changes into the input).

  example uses:

  (adjust-local-time sunday (offset :day-of-week :monday))
  (adjust-local-time epoch (set :timezone to utc-1))
  (adjust-local-time sunday (offset :day by 3))

  "to" and "by" is optional and otherwise is ignored.

the INCOMPATIBLE CHANGES:
- LOCAL-TIME-ADJUST has been renamed to ADJUST-TO-TIMEZONE and not
  exported anymore. the return values (day sec) has been swapped
  to match the small->large order everywhere else.
  instead use: (adjust-local-time time (set :timezone +utc-zone+))

- LOCAL-TIME-ADJUST-DAYS removed in favor of
  (adjust-local-time day (offset :day-of-week :monday))

- MODIFIED-LOCAL-TIME and ADJUSTED-LOCAL-TIME has been merged into
  ADJUST-LOCAL-TIME

- the non-exported LOCAL-TIME-SUM has been dropped

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darcs-hash:437bb2d86e85fda420865bda03506100dc662d69

Eliminated confusing local-time-diff. Added local-time+ and local-time- and encode-duration. Durations are represented in seconds.

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