Upon blank initial state, attempt to add an overlay errors instead of just downloading overlay list

[mystica555]

Layman should attempt to download the list of overlays if it cannot find any sort of already extant overlays in its cache file.

mike@sabayon ~ $ sudo layman -a sublime-text Password:

• Adding overlay...
• Warning: an installed db file was not found at: [u'/var/lib/layman/cache_930c3ed4a5f89f74fd810585751a06e3.xml']
• Exception: Overlay "sublime-text" does not exist.
• CLI: Errors occurred processing action add
• Exception: Overlay "sublime-text" does not exist.

mike@sabayon ~ $ sudo layman -L

• Fetching remote list...
• Warning: an installed db file was not found at: [u'/var/lib/layman/cache_930c3ed4a5f89f74fd810585751a06e3.xml']
• Fetch Ok
• Program "/usr/bin/hg" not found
• File /usr/bin/hg seems to be missing! Overlay type "mercurial" not supported. Did you emerge dev-vcs/mercurial?
• Program "/usr/bin/svn" not found
• File /usr/bin/svn seems to be missing! Overlay type "svn" not supported. Did you emerge dev-vcs/subversion?
• abadonna-overlay [Git ](https://gitlab.com/Abadonna/abadonna-overlay.git, [email protected]:Abadonna/abadonna-overlay.git) -------------- tons of lines deleted ----------------
• zx2c4 [Git ] (git://git.zx2c4.com/portage, http://git.zx2c4.com/portage, ssh://[email protected]/portage

mike@sabayon ~ $ sudo layman -a sublime-text

• Adding overlay...
• Overlay "sublime-text" is not an official. Continue install? [y/n]: y
• Running Git... # ( cd /var/lib/layman && /usr/bin/git clone git://github.com/DamnWidget/sublime-text.git /var/lib/layman/sublime-text ) Cloning into '/var/lib/layman/sublime-text'... remote: Counting objects: 418, done. remote: Total 418 (delta 0), reused 0 (delta 0), pack-reused 418 Receiving objects: 100% (418/418), 83.91 KiB | 0 bytes/s, done. Resolving deltas: 100% (202/202), done. Checking connectivity... done.
• Running Git... # ( cd /var/lib/layman/sublime-text && /usr/bin/git config user.name "layman" )
• Running Git... # ( cd /var/lib/layman/sublime-text && /usr/bin/git config user.email "layman@localhost" )
• Successfully added overlay(s) sublime-text.