re-enable pango, use fontconfig and floats for drawImage()

[jakeg]

• Pango seems to work fine for me (what's the issue its supposed to cause with freetype?) and means I can have fallback fonts, better kerning etc.
• Fontconfig enables finding fonts when using Pango (see also Font Encoding or Secondary font #266 (comment)).
• I have a need for floats rather than ints for the drawImage() arguments.

[terrancesnyder]

+1 on this

[jengel3]

👍 on the floats for drawImage, PR'd this myself because it causes so many issues.

[kangax]

I have a need for floats rather than ints for the drawImage() arguments.

Looks like we should change this indeed. I see drawImage arguments are defined as "double" (http://www.w3.org/TR/2dcontext/#conformance-requirements) which is "a floating point numeric type that corresponds to the set of finite double-precision 64 bit IEEE 754 floating point numbers" (http://www.w3.org/TR/WebIDL/#idl-double)

I don't know about points 1 and 2.

@rvagg @TooTallNate could you folks take a look?

[rvagg]

lgtm, would be nice to have someone confirm that it compiles and works properly without pango with this one applied; @kangax if you don't get anyone doing that just merge and release and see who complains! That ultimately may be the best way to make this project move forward, i.e. upset a few people and make a bit of noise.

[kangax]

@rvagg yep, that's one way to do it :)