test for link checking
improvement of test: use list to store all bad links
typo fix
fixed pep8 violations
Merge pull request #59 from sashakruglov/issue_55

link checking test for /about page
Removed xfail
Merge pull request #60 from AndreiH/fix-adding-skill

Removed xfail
refactored link checking
link crawler
updated requirements
add comment and removed useless condition
Added robustness to search tests
Merge pull request #61 from sashakruglov/issue_56

Issue 56
make code more readable
fix except issue
Merge pull request #63 from bebef1987/except

fix except issue
Added test for non-latin chars. and arked it as xfail
Merge pull request #64 from AndreiH/non-ascii-characters

Added test for non-latin chars. and marked it as xfail
Merge remote-tracking branch 'upstream/master' into issue_57

merge with master
make case-sensitive and replace double quotes to single quotes