Function and keyword argument name deprecations

[mtfishman]

This implements the name changes proposed in #245.

[codecov-io]

Codecov Report

Merging #255 into master will decrease coverage by 0.06%.
The diff coverage is 85.96%.

@@            Coverage Diff             @@
##           master     #255      +/-   ##
==========================================
- Coverage   79.83%   79.77%   -0.07%     
==========================================
  Files          50       50              
  Lines        4805     4830      +25     
==========================================
+ Hits         3836     3853      +17     
- Misses        969      977       +8     

Impacted Files	Coverage Δ
src/decomp.jl	95.94% <ø> (ø)
src/Tensors/linearalgebra.jl	80.83% <70.58%> (-1.70%)	⬇️
src/Tensors/truncate.jl	93.02% <80.00%> (-4.28%)	⬇️
src/mps/mpo.jl	99.09% <93.33%> (-0.30%)	⬇️
src/mps/mps.jl	99.26% <100.00%> (ø)
src/tagset.jl	89.60% <100.00%> (ø)

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[emstoudenmire]

Looks good (fixes #245)