Add required exec_prefix to geoip.pc.in
Add .gitignore
We need at least automake 1.11.4 to provide the necessary config.guess and config.sub for aarch64

This reverts commit 1a18abd94084b887997d8d2133f337a39cced266.
Require autoconf 2.69 to support aarch64
Add region code TH81 Bueng Kan
bootstrap download the dat file if needed
Upd version to 1.5.2