Update README.md with link that works for python wdata package.

See merge request !1

a3aecbd Merge branch 'topic/0.1/issue_13' into 'branch/default'
837c6b2 REL: 0.1.5
dc90791 BUG: Resolves issue #13 by loading files in read-only mode
409fbd8 BUG: Demonstrate issue 13 with readonly files
6fa8b59 SPC: Silly code quality error (noop assignment)
0309120 Start working on 0.1.5
a7a094a Merge branch 'branch/0.1.4' into 'branch/default'
c7fbd90 Added tag 0.1.4 for changeset a390e129ef57
a8fad65 TST: Remove getitem access - use attributes.
bea7ae3 CI: Try adding coverage reports
57f3216 CI,DOC: Added github CI for testing. Updated docs with changelog. Added badges.
3482d04 TST,BUG: 100% code coverage.  Many small bugs fixed.
9daed28 TST,BUG: Added tests for various data shapes, but fail.
cabaf20 BUG: Resolves issue #8.  Allow vector Nv < 3 for wdat format.
8d4e211 TST,BUG: Added tests demonstrating issue #8 with vectors with dim < 3 components..
f07b4a3 BUG: For dimensions less than 3, the data loading is temporary fixed.
a690ace BUG,TST: Resolve issue #5. Empty datasets allowed, and consistent variable dx/dt. * We allow empty datasets (no variables). * Allow for a variety of inputs corresponding to a "variable" dt and DX   but use np.nan internally (since it is a float). * Call rstrip on output lines.
efc4610 BRN: Bump branch to 0.1.4

git-subtree-dir: python
git-subtree-split: a3aecbd757f1cf7e897f27758df8f6918dce5b07

add:
wdata_set_time() in wdata.c
wdata_get_time() in wdata.c
example-write-many-t_varying.c in c-example

modified:
c-example/example-write-many.c
c-example/example-write.c
c-example/example-read.c
Makefile

One needs to create read_cycle_many()