Merge USEOWNSUBDIR and PKGCONFIG build flags; move the pkg-config source file
to scripts/.

Also creating a separate install directory under INCLUDE and LIB directories

Remove static pivot from NuGet autopkg.

This pivot seemed to be causing issues because the NuGet package thought it was actually dynamic.

scripts: Add VS2013 static builds to nuget package

Include more configurations in the Nuget package.

It interferes in a somewhat strange way with codecov reporting

While I grew to dislike references for this case, there are other functions in
the source that use references so switch to that for consistency.

This adds about 40 cycles for parsing <?xml version='1.0'?> declaration and
about 70 cycles for parsing <?xml version='1.0' encoding='utf-8'?>, as
measured on a Core i7, which should be negligible for all documents.

Fixes #16.

It is probably redundant given that we have -Wold-style-cast, but it's better
to warn about casts like this in case we ever need to remove the latter flag.

Fixes #99.

Put CMakeLists.txt in the project root.

Add vs2013 projects

Previously the page size was defining the data size, and due to additional
headers (+ recently removed allocation padding) the actual allocation was a bit
bigger.

The problem is that some allocators round 2^N+k allocations to 2^N+M, which can
result in noticeable waste of space. Specifically, on 64-bit OSX allocating the
previous page size (32k+40) resulted in 32k+512 allocation, thereby wasting 472
bytes, or 1.4%.

Now we have the allocation size specified exactly and just recompute the available
data size, which can in small space savings depending on the allocator.

When using format_raw the space in the empty tag (<node />) is the only
character that does not have to be there; so format_raw almost results in
a minimal XML but not quite.

It's pretty unlikely that this is crucial for any users - the formatting
change should be benign, and it's better to improve format_raw than to add
yet another flag.

Fixes #87.

Also rename auto_deleter_fclose to close_file.

Do not assume that fclose can be converted to int(*)(FILE*)

Do not assume that fclose can be converted to int(*)(FILE*) because some compilers use a special calling convention for stdlib functions like fclose

Having CMakeLists.txt in the project root makes it so much easier to use pugixml
as an external dependency in another CMake project.

Also remove top-level LICENSE file since .podspec already has it.

scripts: Add CocoaPods package

embed license to podspec, as LICENSE file is not in 1.7 tag, cocoapods errors otherwise. Get sources from zeux github

Unify the implementations by automatically deducing the unsigned type from its
signed counterpart. That allows us to use a templated function instead of
duplicating code.