Move the API into a subdirectory for ease of imports.

Previously, if users of our code put the API folder in their pyshared
they would have to import it as "humbug.humbug". By moving Humbug's API
into a directory named "humbug" and moving the API into __init__, you
can just "import humbug".

(imported from commit 1d2654ae57f8ecbbfe76559de267ec4889708ee8)

humbug/bots/zephyr-mirror-crontab

@@ -0,0 +1,26 @@
+SHELL=/bin/bash
+# Edit this file to introduce tasks to be run by cron.
+#
+# Each task to run has to be defined through a single line
+# indicating with different fields when the task will be run
+# and what command to run for the task
+#
+# To define the time you can provide concrete values for
+# minute (m), hour (h), day of month (dom), month (mon),
+# and day of week (dow) or use '*' in these fields (for 'any').
+#
+# Notice that tasks will be started based on the cron's system
+# daemon's notion of time and timezones.
+#
+# Output of the crontab jobs (including errors) is sent through
+# email to the user the crontab file belongs to (unless redirected).
+#
+# For example, you can run a backup of all your user accounts
+# at 5 a.m every week with:
+# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
+#
+# For more information see the manual pages of crontab(5) and cron(8)
+#
+# m h  dom mon dow   command
+35 * * * * env KRB5CCNAME=/tmp/krb5cc_1000.tmp kinit -k -t /home/humbug/tabbott.extra.keytab tabbott/extra@ATHENA.MIT.EDU; mv /tmp/krb5cc_1000.tmp /tmp/krb5cc_1000
+*/2 * * * * /home/humbug/api/bots/check-mirroring &> /var/run/nagios/check-mirroring-results-tmp; mv /var/run/nagios/check-mirroring-results-tmp /var/run/nagios/check-mirroring-results