Fixes #61.

Also add PUGIXML_COMPACT to pugiconfig.hpp

Fixes #43.

Slightly reword format_indent description.

Ensure that all the necessary cleanup is performed in case the allocation fails
with an exception - files are closed, buffers are reclaimed, etc.

Any test that triggers a simulated out-of-memory condition is ran once again
with a throwing allocation function. Unobserved std::bad_alloc count as test
failures and require CHECK_ALLOC_FAIL macro.

Fixes #17.

This eliminates one more hardcoded version from the repo, yay!

It's almost done; the only remaining issue is that some section titles are too long.

Also minor wording fixes.

Users no longer need to #include "pugixml.cpp"

Mostly added correct quotation to changelog.

This is mostly done using regex replaces of original Quickbook markup, plus a
bit of manual fixup for multiple references to the single point from different
lines that AsciiDoc does not seem to handle.

Still need to replace [link ] with actual links.
Also a bunch of small fixes here and there.

Also remove redundant [lbr]

Quickstart should be reasonably complete; manual is still in progress