Update .travis.yml
Update .travis.yml
Update .travis.yml
Update .travis.yml
Update .travis.yml
Update .travis.yml
Working .travis.yml (cleaned up)

Problem was that Travis-CI boxes are 64 bit, and 32 bit libs were not installed.
Fixed by installing libc6:i386 before running CMake.
Merge pull request #44 from dvinc/travis-ci-test

Make Travis-CI successfully download and use CMake 2.8.12 (fixes #19). .travis.yml sections reorganized.