removed addition of None to sys.path in case there is no project root

[borundev]

If the project does not have a rootpath None is added to sys.path. This has been fixed.

[codecov[bot]]

Codecov Report

Merging #8 (98b9f21) into master (5b48ff9) will decrease coverage by 1.03%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
- Coverage   92.50%   91.46%   -1.04%     
==========================================
  Files           3        3              
  Lines          80       82       +2     
==========================================
+ Hits           74       75       +1     
- Misses          6        7       +1     

Impacted Files	Coverage Δ
rootpath/append.py	89.65% <50.00%> (-2.94%)	:arrow_down:

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