Previousely we assumed to add platform implicitly by calling
cordova prepare. Though this works in general, it seems to lead
to plugin versioning issues.

Version bump was forgotten when releasing v0.7.0 tag.

Use App Distributor gem from Docker image

See merge request !3

REDMINE-16868

Do not depenend on externally installed gem.

Split native and js build tasks

See merge request !2

This might exclude android 4 devices.

V0.1.12p1 resource files

See merge request !1

# Conflicts:
#   cordova.sh

on cordova prepare. So we install it manually here.

This reverts commit 1966cea8.