Update TTLowpassLinkwitzRiley2.cpp

original URL with the article seems outdated, replacing it with a working URL
Update TTLowpassLinkwitzRiley4.cpp

original URL with the article seems outdated, replacing it with a working URL
Merge branch 'dev'
Create README.md
Adding waffle badge
Fixing the parsing of directory:/1 address
Don't add quotes if there are quotes already in TTScript::WriteAsText
Adding a quotes option
Removing quotes when writing the name of a cue or a preset
Setting mType attribute not as a readOnly attribute
Setting mType attribute not as a readOnly attribute
Hidding inputAddress and outputAddress attribute
Fixing the initialisation of sub Container
Resolving conflicts when merging dev
Removing a part of code introcduce by error during the merge
Adding quotes option for the overload of toString
Fixing text file reading
Forcing flattening of script during cue managment
Adding special tag filtering case in testNodeUsingFilter
Fixing interpolation and mixing