fixes #2484 - host, hostgroup, and BMC passwords were overwritten as blank

fixes #2685 incorrect and inefficient regexp checking medium name format

It takes eternity to compute something like this:

"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa b" =~ /\A(\S+\s?)+\Z

Also "this is wrong " was not matched

fixes #2679 pie get error when the label is too long

fixes #2669 username first name and last name doesn't accept i18n characters

fixes #2639 After creating user with empty e-mail it becomes impossible to add it.

fixes #2656 error connecting to vsphere after upgrade to ruby 1.9.3

fixes #2646 Asset icon URLs are incorrect when under a different base URL

fixes #2670 - fix apostrophe quoting issue
(cherry picked from commit 4298bd841c3fb2b3f639f06d4cbbb3901f56ec06)

Fixes #2667 - Don't save during process_hostgroup

fixes #2583 - error message is now properly i18n-ed