versions: unload constant before calling Formula.factory

Closes #18634.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
vim 7.3.874

Closes #18642.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
cpanminus 1.6008

Closes #18643.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
node 0.10.1

Closes #18644.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
vimpager 1.8.0

Closes #18645.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
xerces-c: don't install MemParse sample program

Closes #18648.
versions: remove unnecessary variable
versions: add debug output
utils: remove obsolete comment
Turn double modifier into a single conditional
google appengine 1.7.6

Closes #18654.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
sdhash 3.1

Closes #18652.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
ffmbc 0.7-rc8

Closes #18656.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>
RethinkDB 1.4.1

Closes #18653.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
rethinkdb: fix arg quoting
sqlite 3.7.16

Closes #18592.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
harfbuzz: remove autogen

There is no documentation as to why this is necessary, it builds fine
for me without it, and MacPorts does not do it, so I'm removing it. It
can be added back with comments if it breaks for someone.
harfbuzz 0.9.14
libgcrypt 1.5.1
vim 7.3.875

Closes #18674.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>