* Remove ALEMBIC_FIX and merge into INSTALL
Merge pull request #285 from iseppi/alembic-notes

 * Remove ALEMBIC_FIX and merge into INSTALL
 * Nasty hacks to fix initial DB import
Update install instructions to work around alembic
Revert " * Nasty hacks to fix initial DB import"

This reverts commit 45c9560df63cf2417224d9e31b217fc6f4c44d51.
Re-work manual invoice interface and cleanup zkpylons_config.py
 * Manual line items
 * Removal of used products from product list
 * Refunds
 * Ensure payments only occur once
Merge pull request #288 from iseppi/manual-invoice

Re-work manual invoice interface and cleanup zkpylons_config.py
 * Ensure there is a default display order
 * Remove references to non-existant default ceiling accomodation-selfbook
Merge pull request #289 from iseppi/product-display-order

Non-alembic fixes to default DB load
 * Change reference new commit
Merge pull request #290 from iseppi/update-docs

 * Change reference new commit
 * Fix uml graph
Merge pull request #291 from iseppi/fix-umlgraph

 * Fix uml graph
 * Add ical feed for each room
Merge pull request #292 from iseppi/room-ical

 * Add ical feed for each room
 * Ensure we have a product before we check it's category
Merge pull request #293 from iseppi/fix-voucher

 * Ensure we have a product before we check it's category
 * Add volunteer_signup for volunteers mailing list
Merge pull request #294 from iseppi/add-volunteer-mailing-list

 * Add volunteer_signup for volunteers mailing list
 * Add lca2013 admin reports to trunk