[ENH] Allow label exclusion in remove_distance()

[rmarkello]

Allows users to specify labels to consider in abagen.correct.remove_distance() if atlas_info and atlas do not match.

[codecov-io]

Codecov Report

Merging #27 into master will increase coverage by 0.02%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #27      +/-   ##
==========================================
+ Coverage   98.17%   98.19%   +0.02%     
==========================================
  Files          14       14              
  Lines         603      611       +8     
==========================================
+ Hits          592      600       +8     
  Misses         11       11

Impacted Files	Coverage Δ
abagen/utils.py	96.47% <100%> (+0.08%)	⬆️
abagen/correct.py	100% <100%> (ø)	⬆️
abagen/tests/test_correct.py	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 88e14c1...41cb24c. Read the comment docs.

[coveralls]

Pull Request Test Coverage Report for Build 144

• 11 of 11 (100.0%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.02%) to 98.2%

---

Totals
Change from base Build 139:	0.02%
Covered Lines:	600
Relevant Lines:	611

---

💛 - Coveralls