Added support for git --verify-signatures in gitcord

Added the ability for gitcord to use the --verify-signatures flag
when pulling from a repo if the git version is new enough.
add documentation documentation

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add todo:s for what write should do

Signed-off-by: Mattias Andrée <maandree@operamail.com>
Merge remote-tracking branch 'goakley/master'
minor style fixes

Signed-off-by: Mattias Andrée <maandree@operamail.com>
a bit long doc line

Signed-off-by: Mattias Andrée <maandree@operamail.com>
more accurate git version check

Signed-off-by: Mattias Andrée <maandree@operamail.com>
variable rename

Signed-off-by: Mattias Andrée <maandree@operamail.com>
typo

Signed-off-by: Mattias Andrée <maandree@operamail.com>
print usage is spikeless does not have enougth arguments

Signed-off-by: Mattias Andrée <maandree@operamail.com>
derpy

Signed-off-by: Mattias Andrée <maandree@operamail.com>
derpydo

Signed-off-by: Mattias Andrée <maandree@operamail.com>
readme typo

Signed-off-by: Mattias Andrée <maandree@operamail.com>
cleanup derp

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add plug-in support

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add concurrency lock with shared and exclusive flocks

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add possibility to make proofreading extensions

Signed-off-by: Mattias Andrée <maandree@operamail.com>
add support for example shots

Signed-off-by: Mattias Andrée <maandree@operamail.com>
pony friendly field output

Signed-off-by: Mattias Andrée <maandree@operamail.com>
partial implementation of issue 14

Signed-off-by: Mattias Andrée <maandree@operamail.com>