yast2 - do not convert data files
Merge pull request #375 from lslezak/yast2_exclude_data

yast2 - do not convert data files
mouse - sync the patch with upstream
Merge pull request #376 from lslezak/mouse_sync

Mouse - sync the patch with upstream
README.md: Add packages needed to build YaST module packages
README.md: Fix typo in "libldapcpp-devel" package name
Command#save_env: Make it actually work

Before this commit, Command#save_env didn't really work. The problem was
that env_old was a *reference* to the ENV variable, not a *copy*. As a
result, any modifications to ENV done in the passed block were not
reverted back.

In practice, this caused trouble when the RUBYOPT variable was left
undefined by PackageCommand and "y2r" could not be found later.

This commit resolves the problem by making sure that ENV items are
copied on save. This is complicated by the fact that ENV isn't really a
Hash -- see the comment in code for details.
Command#save_env: Improve variable name
README.md: Add "ca-certificates-mozilla" YCP Killer dependency
Merge pull request #377 from yast/readme-add-package-build-deps

README.md: Add packages needed to build YaST module packages
Merge pull request #378 from yast/readme-libldapcpp-devel-typo-fix

README.md: Fix typo in "libldapcpp-devel" package name
Merge pull request #380 from yast/readme-add-ca-certificates-mozilla

README.md: Add "ca-certificates-mozilla" YCP Killer dependency
Command#save_env: Only yield needs to be wrapped in begin...ensure
Merge pull request #379 from yast/fix-save-env

[Review] Request from '' @ 'yast/ycp-killer/fix-save-env'
README.md: Add "obs-service-format_spec_file" YCP Killer dependency
README.md: Align comments
Merge pull request #381 from yast/readme-add-obs-service-format-spec-file

[Review] Request from '' @ 'yast/ycp-killer/readme-add-obs-service-format-spec-file'