bootloader should read pythonlib name from its metadata

[matysek]

Original date: 2011/07/07

Now the bootloader is trying several names of python DLL at runtime.

However this could be implemented using metadata, where during the build process name of python library would be written as metadata to exe file and then read at runtime without trying several names of python library.

This would:

• eliminate code duplication in build.py and bootloader code
• maybe we could get small performance improvement

[matysek]

Original date: 2012/08/31

Bootloader is able to save some metadata in something called cookie.

[matysek]

Original date: 2012/09/01

This is implemented in latest dev branch.