FIX: shape adjustment in waverec should not assume a transform along …

[grlee77]

…axis 0

see detailed description of the issue in #293

The basic issue relates to forward followed by inverse DWT of odd-sized data results in an array that is rounded up to the next largest even size. The various multilevel DWT routines truncate the extra sample appropriately to deal with this. This fixes a bug where this was not done appropriately in waverec when axis != 0.

[codecov-io]

Codecov Report

Merging #294 into master will decrease coverage by -0.04%.
The diff coverage is 75%.

@@            Coverage Diff             @@
##           master     #294      +/-   ##
==========================================
- Coverage   86.26%   86.22%   -0.04%     
==========================================
  Files          21       21              
  Lines        3086     3092       +6     
  Branches      532      535       +3     
==========================================
+ Hits         2662     2666       +4     
- Misses        371      373       +2     
  Partials       53       53

Impacted Files	Coverage Δ
pywt/_multilevel.py	92.6% <75%> (-0.56%)	❌
pywt/_wavelet_packets.py	78.12% <0%> (ø)	✅

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[rgommers]

LGTM, merged.