Update README.md

ipc-client: wmderlandc: add support for new commands in 1.0.4

CMakeLists.txt: 1.0.3 release

CMakeLists.txt: bump version to 1.0.2

snapshot: Serialize all client's bool member variables

Previously Client::is_mapped_ and Client::has_unmap_req_from_wm_
were not serialized into snapshot, so if the WM crashes, all windows
that are mapped will be considered unmapped.

This commit fixes this.

catch std::bad_alloc and update comment

util: add const to a static variable in function

update version number

Update README.md

Merge branch 'staging'