Ref #7.  Removed orphaned files, i.e. instances where the file content has been moved elsewhere in the documentation.
Ref #36.  Hid toctree elements and reworked the header pages towards the new system.
Updated MySQL source installation for new material from pull.
Updated hover text for Edit on Github link.
Merge branch 'gh10' into 3.x
Merge branch 'gh47' of github.com:codership/galera into gh47
Merge branch 'gh47' into 3.x
Slight enhancement to CRC32C unit test
Merge branch '3.x' of github.com:codership/galera into 3.x
Refs #59: Fixes compilation on PowerPC to the extent possible (in QEMU-emulated VM)
Ref #61: Revisions to admin guide pages.
Merge branch '3.x' of https://github.com/codership/galera into 3.x

Updates to admin guide pages.
Merge branch '3.x' of github.com:codership/galera into yan