Problem: Cannot generate qt-android build systems
Solution: Add build-qt-android.gsl
Merge pull request #31 from jemc/qt-android

Problem: Cannot generate qt-android build systems
Merge pull request #32 from jemc/master

Problem: Warning headers for generated code are not consistent
Problem: .gitignore references czmq-specific files
Solution: Trim down .gitignore

(Note that this is the gitignore for zproject,
not for projects generated by zproject)
Merge pull request #33 from jemc/ignores

Problem: .gitignore references czmq-specific files
Problem: PR #31 clobbered PR #30
Solution: Restore changes from PR #30