istext("I am text") returns false - rename to `istextmime`

[catawbasam]

In multimedia.jl, istext() is intended to assess MIME types. But since the istext() is exported, it can be taken out of context and generate counter-intuitive results. Maybe a more descriptive name would be warranted?

From multimedia.jl --

# it is convenient to accept strings instead of ::MIME
istext(m::AbstractString) = istext(MIME(m))

[stevengj]

Probably istextmime would be better.

[ccsv]

@stevengj Agreed users can easily confuse MIME types with strings

[nalimilan]

Or just remove the convenience version accepting strings. MIME"some/type" isn't that long.

[stevengj]

@nalimilan, that would work, but you would need to add a method istext{T}(::Type{MIME{T}})

[ScottPJones]

istext seems like it would be used to distinguish between binary and text string types.
ismimetext instead of istextmime I think might be a bit better.

[JeffBezanson]

+1 for renaming to something involving mime.