change travis to use phpunit 4.2.x
[BUGFIX] load `sub/index.md` if `sub.md` not found

According to the documentation, when going to url `/sub` the core looks first for
`content/sub.md` and then for `content/sub/index.md` if the first one doesn't
exist. That didn't work before, but that's now fixed.

There was actually a leading slash `/` missing when appending `index` to the
path name.

Resolves: #126
Documentation: #126
Releases: 1.3.0
Related: #126, #117, #119
Merge pull request #127 from Stijn-Flipper/patch-1

[BUGFIX] load `sub/index.md` if `sub.md` not found
[HOTFIX] fix getting settings
[TASK] added unit tests for meta model and page repository
added link/badge to gitter
removes dead code
don't lint lib/vendor files: kills travis-cm performance
Merge pull request #130 from Schlaefer/feature/dont-lint-vendor-files

[TASK] don't lint lib/vendor files
Merge pull request #129 from Schlaefer/feature/remove-dead-code

[TASK] removes dead code
[BUGFIX] fix problem with hidden files and dots in pathes
move FilterIterator into a subfolder
return always true, no filter needed here
Merge pull request #134 from NeoBlack/bugfix/PageRepository

[BUGFIX] fix problem with hidden files and dots in pathes
Merge branch 'master' of https://github.com/PhileCMS/Phile
fix changelog