Added logic for determining which threads need to be downloaded and which already present the data we need in the preview.
Added vector of posts that need to be added to the database.
Added logic for dealing with newly inserted posts.
Added grab img method.
Added grab thread.
Added a process thread method.
Added constructor.
Added chan driver test file.
Added chan driver to the build script.
Fixed werid formatting.
Fixed missing includes.
Fixed erronous include.
Fixed incorrect use of mem_fn.
Fixed parameter typo.
Removed hard coded value and added parater for it.
Fixed typo.
Fixed incorrect usage of parser and parsing thread calls.
Fixed signed/unsigned comaprison.
Updated changed variable name.
Updated call to modified function signiture.