TextMIDITools v1.0.53

[tomejanzen]

C++ tactics.
Concatenate strings for output esp. to cerr.
Reserve room in vectors prior to using back_inserter.
Procedurize conversion of hex and decimal strings for textmidi.
Remove types from pair, replace with make_pair().
Use cbegin() and cend() when applicable.
Replace use of distance() with for-initialized variable.

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This discussion was created from the release TextMIDITools v1.0.53.