Add timings with --verbose.

[hmcezar]

Added --verbose option.

For now, using this option just print the timings of parts of the program.

[codecov]

Codecov Report

Attention: 14 lines in your changes are missing coverage. Please review.

Comparison is base (64147b9) 58.39% compared to head (3f3d93e) 57.81%.

Files	Patch %	Lines
clusttraj/main.py	41.66%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #10      +/-   ##
==========================================
- Coverage   58.39%   57.81%   -0.58%     
==========================================
  Files           7        7              
  Lines         524      550      +26     
==========================================
+ Hits          306      318      +12     
- Misses        218      232      +14     

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