Version=>1.0.7.0

• Added liberapay username validation in donation/
  #57 By @VamatoHD
  Code reviewed by @kaifcodec

• Added wildcard-based username permutations with limit support
  #64 By @ganeshnikhil
  Code reviewed by @VamatoHD and @kaifcodec

• Generalized category loading to automatically detect new categories
  #67 By @VamatoHD
  Code reviewed by @kaifcodec

• Minor fixes and improvements from the above PRs