Simplify standard parameters of augmenters

[aleju]

Change the standard parameters shared by all augmenters to a
reduced and more self-explanatory set. Previously, all augmenters
shared the parameters name, random_state and deterministic.
The new parameters are seed and name.

deterministic is removed as it was hardly ever used and because
it caused frequently confusion with regards to its meaning. The
parameter is still accepted but will now produce a deprecation
warning. Use <augmenter>.to_deterministic() instead.
(Reminder: to_deterministic() is necessary if you want to get
the same samples in consecutive augmentation calls. It is not
necessary if you want your generated samples to be dependent on
an initial seed or random state as that is always the case
anyways. You only have to manually set the seed, either
augmenter-specific via the seed parameter or global via
imgaug.random.seed() (affects only augmenters without their
own seed).)

random_state is renamed to seed as providing a seed value
is the more common use case compared to providing a random state.
Many users also seemed to be unaware that random_state accepted
seed values. The new name should make this more clear.
The old parameter random_state is still accepted, but will
likely be deprecated in the future.

[breaking] This patch breaks if one relied on the order of
name and random_state instead of their names. These parameters
are now in inverted order, i.e. (..., seed=None, name=None, ...)
as seeds are much more commonly used than names.

[codecov-io]

Codecov Report

Merging #567 into master will decrease coverage by 0.01%.
The diff coverage is 95.38%.

@@            Coverage Diff             @@
##           master     #567      +/-   ##
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- Coverage   96.49%   96.48%   -0.01%     
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  Files          40       40              
  Lines       14537    14550      +13     
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+ Hits        14027    14038      +11     
- Misses        510      512       +2