Read logs from journal and fix display issue when deleting functions

Changelog for 0.8.1:

• PR #60 Initial journald log provider attempt by @LucasRoesler
• PR #61 Skip adding function if GetFunction returns error by @carlosedp

Commits
cece6cf Improve journalctl version compat by @LucasRoesler
22882e2 Initial journald log provider attempt by @LucasRoesler
667d74a Skip adding function if GetFunction returns error by @carlosedp
9dcdbfb Update DEV.md by @alexellis
3a9b812 Promote to 0.8.0 with pull policy of always by @alexellis
734425d Update the dev workflow by @alexellis

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