Update readme.md
Fixed extra html option tag

Ref: comment on commit https://github.com/simpleinvoices/simpleinvoices/commit/5b645fd2dc16a901d78353633d5429b6e34e6fb2
Short input tag 1
Short input tag 2
Short input tag 3
Corrected domain_id determination logic in domain_id class

Ref: https://github.com/apmuthu/simpleinvoices/commit/f99beab8cc5115cd099e2dbbc08238ef42e21093
domain_id class logic simplified

No more fake_auth checks needed
defaults take care of weird situations
Corrected object type in inventory class
Cron Log Unique key since least count of cron is 1 day #1

Ref: https://github.com/apmuthu/simpleinvoices/commit/f890d6717bd9db147f34f7f220367485efbfd887
Cron Log Unique key since least count of cron is 1 day #2

Ref: https://github.com/apmuthu/simpleinvoices/commit/f890d6717bd9db147f34f7f220367485efbfd887
Cron Log Unique key since least count of cron is 1 day #3

Ref: https://github.com/apmuthu/simpleinvoices/commit/f890d6717bd9db147f34f7f220367485efbfd887
Cron Log Unique key since least count of cron is 1 day #4

Ref: https://github.com/apmuthu/simpleinvoices/commit/f890d6717bd9db147f34f7f220367485efbfd887
Substituted Patch 288 (DROP TABLE si_index) with dummy for now

This will help maintain sequence for subsequent patches. All new installs are expected to switch to the the real sql that is commented out here.
Removed reference to products_matrix table as not in present schema

Still present in text_ui and mini extensions that need updation

Ref: https://github.com/apmuthu/simpleinvoices/commit/f9ee9c3ac0e57ad14cc0d573099dd26601fb768b
flexigrid.css moved to extensions text_ui and mini
Patch 290 falg fields to TINYINT(1)
class methods instead of normal functions in extensions
login fix, typos, code cleanup
multi-domain class updates with constructor for domain_id
multi-domain updates for modules