CodeIgniter Localizing into Japanese

translated libraries/input.html.

translating helpers/captcha_helper.html

translated general/creating_drivers.html

update libraries/loader.html: please review my translation.

translated general/drivers.html

translating general/drivers.html

improve script for creating release package

create release tag

create release tag

update downloads.html

update README file for 1.7.3-1 release

fix original user guide bug, and reporting to https://bitbucket.org/ellislab/codeigniter/issue/266/173-user-guide-bug

translate changelog.html

translate upgrade_173.html

add 1.7.3 English changelog

update user guide version from 1.7.2 to 1.7.3

add new files at 1.7.3

rename 1.7.2 branch to 1.7

update libraries/output.html:

update libraries/parser.html:

update libraries/sessions.html:

update libraries/table.html:

update libraries/unit_testing.html

Update

create release tag

create release tag

update README file

update File Uploading Class documentation by 1.7.2 security patch

update copyright year

create user guide 1.7.2 branch