* Added support for Proj6 and GDAL 3
* install proj6
* build proj with local installation dir
* conditional proj dependency
* added proj4 flags for all gdal versions
* Restore debian data tests
* Version specific proj configuration
* Fix string comp expression
* Explicit matrix
* Restructure build matrix
* Remove wait from proj build script
* Call script with bash
* Fix version text
* Bash syntax
* Correct PROJOPTs
* Use xvfb service
* Back to proj 4.8 for older GDAL
* Fix syntax error
* Add verbosity to tests
* Take proj off library path, remove gdal-bin package
* Install PROJ and GDAL to same prefix
* Set up runtime env
* Try 4.9.3
* Source build scripts
* Switch to case for versions
* set trace
* Test existence of share/gdal directory
The proj install script created the gdal install directory so a
test for just that is not sufficient.
* Test for share/proj
* Run tests under gdb
* Forgot the run command
* Wait 20 for GDAL
* travis_wait
* Restructure build script, less boilerplate
* Back to trusty
* dist: trusty
* Remove gdb
* Allow 3.0.1/6.1.1 to fail, some changes since 3.0.0/6.1.0
