RavenDB-1290 Searching continuous ranges of free pages in a cycle
RavenDB-1290 Changing type of indexer variable to 'long'
RavenDB-1290 Size of memory needed to allocate buffers for free pages should take into account that internally UnmanagedBits stores the bits as integers
RavenDB-1290 Can set dirty flag on buffer
RavenDB-1290 Copy clean buffer to a dirty one if needed - in progress. Exposing issue with BitBuffer. Fixing the way that we calculate number of bytes to allocate in order to work with UnmanagedBuffers