update CHANGELOG

Signed-off-by: Julien Veyssier <[email protected]>

Merge pull request nextcloud#254 from nextcloud/tacruc-patch-1

bumped version to 0.1.5

Merge pull request nextcloud#238 from nextcloud/v0.1.4

bumped version to 0.1.4

Merge pull request nextcloud#232 from nextcloud/Use-Background-Job-fo…

…r-Scan

Moved the scan of each individual picture in an BackgroundJob

Merge pull request nextcloud#105 from nextcloud/release-0.1.2

update CHANGELOG and bump to v0.1.2

Merge pull request nextcloud#87 from nextcloud/fix-contact-noname

refs nextcloud#85 fix bug with unnamed contacts

Merge pull request nextcloud#79 from nextcloud/scan-on-install

run photo and track scan on app installation