Clarifying stuff on README
Moved stuff to detail/container
unicode_error plays nice with MI and uses UTF-8 for what()
Add Boost.Exception support
Remove version bits
Exclude abandoned branch from build
Install all of boost for build
Fix build
Update issue tracker link to README
Merge branch 'master' into iterators-must-go

Conflicts:
	.travis.yml
	SConstruct
	deps/wheels
	include/ogonek/encoding/ascii.h++
	include/ogonek/encoding/encoding_scheme.h++
	include/ogonek/encoding/iterator.h++
	include/ogonek/encoding/utf16.h++
	include/ogonek/encoding/utf32.h++
	include/ogonek/encoding/utf8.h++
	include/ogonek/error/throw_error.h++
	include/ogonek/segmentation/detail/word_iterator.h++