Updated tqdm code and renamed a variable

[girishponkiya]

1. Updated tqdm code to prevent it from writing a new line for each iteration. Now, it updates the progress for a loop in the same line.
2. Renamed a variable (from dir to _dir) to avoid possible conflict as dir is an inbuilt keyword.

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (master@0a77e2e). Click here to learn what that means. The diff coverage is 79.54%.

@@            Coverage Diff            @@
##             master      #22   +/-   ##
=========================================
  Coverage          ?   78.91%           
=========================================
  Files             ?       30           
  Lines             ?     2419           
  Branches          ?        0           
=========================================
  Hits              ?     1909           
  Misses            ?      510           
  Partials          ?        0           

Impacted Files	Coverage Δ
framenet_tools/main.py	71.83% <0.00%> (ø)
...menet_tools/frame_identification/frameidnetwork.py	88.51% <82.35%> (ø)
...ramenet_tools/span_identification/spanidnetwork.py	96.63% <84.00%> (ø)

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[jcklie]

Thank you!