- mk/linux/setupBuildDeps.sh:
  - add option for silent installs (APT only for now)
  - remove autotools, subversion dependency
  - add check for availability of 'git' command
  - replace svnversion by git commit output
- add .travis.xml as per http://about.travis-ci.org/docs/user/languages/cpp/
- make git ignore megaglest man page as generated by Linux builds