Properly throw exception when an external function returns an error
Add get_read_frame and get_write_frame

get_read_frame and get_write_frame exports frame data in a Python
friendly way.

Uses Cython's Memory view which uses PEP3118 buffer protocol. This
allows the functions to be used as inputs into other libraries which
supports the buffer protocol, for example numpy.

Example:
import vapoursynth as vs
import numpy as np
core = vs.get_core()
clip = core.std.BlankClip(color=[512,12,1023], format=vs.YUV420P10)
fr = clip.get_frame(0)
mem = fr.get_read_frame(0)
p = mem[0,0] #p = 512
import numpy as np
np.asarray(mem)

def mod_frame(n, f):
print("Frame: {}".format(n))
fout = f.copy()
data = fout.get_write_frame(0)
for x,row in enumerate(data):
    for y, value in enumerate(row):
        data[x,y] = 255
return fout

out=clip
out = core.std.ModifyFrame(clip, clip, selector=mod_frame)
print(out)
out.set_output()
read/write_frame Float Support

Adding in float support to get_read_frame and get_write_frame

Removed 8 byte sample support as 8 byte samples don't exist.
Merge pull request #111 from splinter98/pyframedata

Export Frame Data to Python
Merge branch 'master' of https://github.com/vapoursynth/vapoursynth.git
Fix previous commit to take stride into consideration
Add ewn plugins to list
Add lazy mac compilation guide
Copyright year
Make registerFormat return null instead of terminate on invalid formats
Bump version number
Add linux and mac compilation pages
Improve register_format in python
Add getPluginPath to vsapi
Use proper python exception
More consistent nullptr use
Dot chaining of commands, part 1
Dot chaining part 2, the completening?
More "elegent" isinstance syntax

isinstance() accepts a tuple of types to check against.
Merge pull request #112 from bugreport0/patch-1

More "elegent" isinstance syntax