Adapted the latest changes to PatentLens
The function getKeywordsFromPatents() is enhanced
Fixed : isset() can take many arguments (reducing the cyclomatic complexity : sonar) + CS
Merge pull request #18 from younesherlock/1.2.3

Enhanced getKeywordsFromPatents() & isset() modified (sonar)
Merge pull request #6 from aybbou/master

Updated 1.2.3 : enhanced functions (sonar)