Gd 198 unit test for merge funcions

See merge request !12

Gd 124

See merge request !13

GD-176 AND 177 appending function and without unit df support

See merge request !11

# Conflicts:
#   README.md

update readme file

See merge request !10

update readme and add name

See merge request !7

Gd 57

See merge request !6

Gd 57 merge ASCii

See merge request !5

fixed the number of columns didn’t match the number of data && Slocum’s data didn’t match dinkum’s data in problem.

St-39,40 dinkum2pandas and pair function

See merge request !4

GD-52 replace print() and exit() with raise

See merge request !3