Expose merge node
Fix erf function
Add linear gradient node
Implementation of gaussian IIR filter with stride for column/row processing
Cleanup and improved performance of blackman and cubic window functions
Merge branch 'refs/heads/master' into node-refactor
Update notes
Create local references to resource paths
Typo
Merge branch 'refs/heads/master' into node-refactor

Conflicts:
	Source/main.lua