add day_of_year in parser

[aysonje]

Resolves #396

[codecov-io]

Codecov Report

Merging #481 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #481   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          14     14           
  Lines        3189   3226   +37     
  Branches      229    236    +7     
=====================================
+ Hits         3189   3226   +37

Impacted Files	Coverage Δ
arrow/formatter.py	100% <100%> (ø)	⬆️
arrow/parser.py	100% <100%> (ø)	⬆️
tests/formatter_tests.py	100% <100%> (ø)	⬆️
tests/parser_tests.py	100% <100%> (ø)	⬆️

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[systemcatch]

Hey, sorry this has taken so long to be looked at. If we can fix the conflicts with master then I'd like to try and merge this in with a few changes. I'm not keen on having both DDD and j doing the same thing, better to just stick with DDD for consistency imo, %j can just be kept for working with the strptime class method.

We could also look at adding support for DDDD (zero padded version for day of year) but that can always be another PR.

[systemcatch]

Parsing for the DDD and DDDD tokens has been implemented in the 0.15.0 branch.