Adding HttpClient stubs.
Merge branch 'master' into GettingHtmlContent

Conflicts:
	src/PowerpointForgery/CMakeLists.txt
	src/PowerpointForgery/PowerpointForgery.vcxproj
Adding HttpClient impl. Getting Html content from URLs.
Retrieving html content. Filtering non-html content.
Reordering CMakeLists source files.
Fixing Concurrency resolution for g++.
Fixing the tests on travis.
Merge branch 'GettingHtmlContent' of github.com:PaulDib/ppt-forgery into GettingHtmlContent
Merge pull request #23 from PaulDib/GettingHtmlContent

Allez hop, on merge.