Move all wrappers to new pyglibc package

This package moves all of the numerous modules into a new top-level
package. Unlike glibc which has just the raw bindings, pyglibc builds
high-level, pythonic APIs around a subset of supported glibc features.

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
Add pipe2(2) wrapper functions

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
Use more pythonic APIs in EpollSelector demo

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@canonical.com>