Adds support for building from paths with spaces.

Attempting to build POCO on Windows when it was sitting in a path with spaces (e.g., C:\my source\poco-1.4.6p2\) failed.  This would occur if you did the following from a VS command prompt:
cd "C:\my source\poco-1.4.6p2"
buildwin.cmd 110

The root cause was storing the output of the CD command in a local variable and then attempting to cd into that variable later without appropriately quoting it.
Merge pull request #308 from Micah71381/develop

Adds support for building from paths with spaces.
fixed GH# 316: Poco::DateTimeFormatter::append() gives wrong result for Poco::LocalDateTime
Merge branch 'develop' of https://github.com/pocoproject/poco into develop
VS 2013 projects/solutions
Merge branch 'develop' of https://github.com/pocoproject/poco into develop
removed MFC dependencies (WinTestRunner) from test VS projects
various fixes - see CHANGELOG
updated TwitterClient to use new Twitter API 1.1 and OAuth
minor fix