nabor 0.5.0

• add radius bounded search (#6, #7)
• remove register keyword from C++ libnabo (#9)

nabor v0.4.7

• dev: register native routines as recommended for R 3.4.0
• dev: update travis

nabor v0.4.6

A minor release with the following changes since v0.4.5

• make RANN test conditional
• Fix description for R 3.2.0
• roxygen2/Rcpp updates