Support IOContext flags in show

Merge pull request #189 from JuliaGizmos/teh/showperf

Support IOContext flags in show

replace last warn with @warn

Merge pull request #187 from jaakkor2/patch-1

Update core.jl: warn() -> @warn

fix show for Signal{Nothing}

Merge pull request #185 from JuliaGizmos/pv/print

fix show method for Signal

drop 0.6, support 0.7!

v0.8.0

drop 0.6

fixes for 0.7 - drop julia 0.5 support

Merge pull request #178 from JuliaGizmos/sd/07

changes for 0.7

v0.6.0

• add value(x::Any) fallback

Fix Freeze (#144)

Fixes:
JuliaGL/GLVisualize.jl#180
JuliaGL/GLVisualize.jl#175

Adds option for non-initialising bind

Adds a new initial keyword argument to bind!. See ?bind! for full details. Thanks @yakir12 !

Fix everything

@JobJob's redesign to fix ordering of updates, and a bug fix by @SimonDanisch. Includes #129 #137 #138 #139 🥂

fix constructor for Signal{T<:DataType}

Merge pull request #136 from JuliaGizmos/sd/construcor

fix constructor for types