The version reported by toolchain is 4.6.x-google so regex needs an adjustment.

Overloaded PCA constructor and ( ) operator to implement Feature#2287 - PCA that retains a specified amount of variance from the data. A sample was added to samples/cpp to demonstrate the new functionality. Docs and Tests were also updated

Local reference table overflow in JNI code fixed.

added openfabmap code, contributed by Arren Glover. fixed several warnings in the new versions of retina filters

add remap

* fix formatting
* honor Windows-style paths
* suppress warnings inside try_compile
* correct caching of toolchain variables

updated Retina module code for more flexible parallelisation : TBB parallel for loops are replaced by opencv parallel_for_ wrapper... compile error corrected

updated code for more flexible parallelisation : TBB parallel for loops are replaced by opencv parallel_for_ wrapper