fix url

Author: dehann

README.md

@@ -6,7 +6,7 @@
 [![DistributedFactorGraphs](http://pkg.julialang.org/badges/DistributedFactorGraphs_0.6.svg)](http://pkg.julialang.org/?pkg=DistributedFactorGraphs&ver=0.6)
 [![DistributedFactorGraphs](http://pkg.julialang.org/badges/DistributedFactorGraphs_0.7.svg)](http://pkg.julialang.org/?pkg=DistributedFactorGraphs&ver=0.7)
 
-**Note** this package is still under initial development, and will adopt parts of the functionality currently contained in [IncrementalInference.jl](JuliaRobotics/IncrementalInference.jl).
+**Note** this package is still under initial development, and will adopt parts of the functionality currently contained in [IncrementalInference.jl](http://www.github.com/JuliaRobotics/IncrementalInference.jl).
 
 # Install