First implementation of identity editing

app/build.gradle

app/src/main/AndroidManifest.xml

...de/kuschku/libquassel/syncables/types/SyncableObject.java

...schku/libquassel/syncables/types/abstracts/AIdentity.java

.../de/kuschku/libquassel/syncables/types/impl/Identity.java

...chku/libquassel/syncables/types/interfaces/QIdentity.java

...java/de/kuschku/quasseldroid_ng/ui/chat/MainActivity.java

...d_ng/ui/coresettings/identity/IdentityCreateActivity.java

...oid_ng/ui/coresettings/identity/IdentityEditActivity.java

...oid_ng/ui/coresettings/identity/IdentityListActivity.java

...ng/ui/coresettings/identity/nick/IdentityNickAdapter.java

.../coresettings/identity/nick/IdentityNickListActivity.java

...oid_ng/ui/coresettings/network/NetworkCreateActivity.java

...droid_ng/ui/coresettings/network/NetworkEditActivity.java

...oresettings/network/server/NetworkServerListActivity.java

app/src/main/res/layout/activity_identity_edit.xml

app/src/main/res/layout/activity_nick_list.xml

app/src/main/res/layout/widget_identitynick.xml

app/src/main/res/layout/widget_networkserver.xml