Bump version to 0.15.0master
treece3f4585679d70d1610653a66691e41b0a43f0ea
drwxr-xr-x - .github
-rw-r--r-- 256 .gitignore
-rw-r--r-- 115 .gitmodules
-rw-r--r-- 294 .travis.yml
-rw-r--r-- 35149 COPYING
-rw-r--r-- 4429 README.md
-rw-r--r-- 1030 appveyor.yml
drwxr-xr-x - data
drwxr-xr-x - debian
drwxr-xr-x - flatpak
-rw-r--r-- 1512 meson.build
drwxr-xr-x - meson
-rw-r--r-- 730 meson_options.txt
drwxr-xr-x - po
drwxr-xr-x - scripts
drwxr-xr-x - snap
drwxr-xr-x - src