v0.8.0

reimplementation of text layout

Bugfixes:

- better support for full width characters
- indentation of broken lines works with older urwid versions
- list of referencing commits if gitu is called with filtering arguments
  commit 7c1cccc4ee24f7c7f67f104c174f73140c63d00a

New features:

- new command line arguments:
    --align left|right|center|'left indentation'
    --wrap any|space|clip|ellipsis
    --no-graph
    --explicit-spaces
    --help
- indentation in details view

Changes:

- don't highlight indentation of selected log entry
  commit 7e535c924bbab99331c63501ab8bacaf42046dd5
- usually no warning anymore if packaging is not installed
  commit 4c80214440e39ebde9d687cebc8a2b4c8a728096
  commit 45a16548a99618b68d80af6e1a7b31e61c48a25c
  commit 8fe8b4f630bc04163af7050b373e1dfb6fdaba29

Documentation:

- added command line argument --version which has been implemented in v0.7.0