clang-tidy/reformat

[Ithanil]

• like in the other repos, added clang-tidy and applied the trivial suggestions ("-fix")
• added JetBrains/CLion .idea folder with some shared project config files
• used the same code formatting settings as in the other repos to reformat the code
• ported some small script changes from other repos
• example folders now have proper names instead of simple enumeration

[coveralls]

Pull Request Test Coverage Report for Build 267

• 1426 of 1792 (79.58%) changed or added relevant lines in 85 files are covered.
• 13 unchanged lines in 6 files lost coverage.
• Overall coverage increased (+0.7%) to 80.505%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
include/ffnn/actf/ActivationFunctionInterface.hpp	4	5	80.0%
include/ffnn/net/FeedForwardNeuralNetwork.hpp	19	20	95.0%
src/actf/ActivationFunctionManager.cpp	15	16	93.75%
src/feed/WeightedFeeder.cpp	10	11	90.91%
src/fmap/MultiDimStaticMap.cpp	12	13	92.31%
src/fmap/OneDimStaticMap.cpp	4	5	80.0%
include/ffnn/feed/WeightedFeeder.hpp	4	6	66.67%
include/ffnn/layer/InputLayer.hpp	10	12	83.33%
include/ffnn/layer/NNLayer.hpp	11	13	84.62%
include/ffnn/layer/OutputNNLayer.hpp	11	13	84.62%
<!--	Total:	1426	1792	79.58%	-->

Files with Coverage Reduction	New Missed Lines	%
src/layer/NNLayer.cpp	1	73.33%
src/train/NNTrainerGSL.cpp	1	89.4%
src/train/NNTrainer.cpp	1	75.17%
src/fmap/EuclideanDistanceMap.cpp	1	48.28%
src/net/FeedForwardNeuralNetwork.cpp	3	76.39%
src/io/PrintUtilities.cpp	6	0.0%
<!--	Total:	13		-->

Totals
Change from base Build 261:	0.7%
Covered Lines:	2519
Relevant Lines:	3129

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💛 - Coveralls