Description of problem:

VALID_INPUT_CHARS = abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%^&*()_-+|=\~`:;"'{[}]<,>./

Marathi inscript has character mapped on '=' key as well 

'=' ृ

if we add '=' in VALID_INPUT_CHARS it throughs

Traceback (most recent call last):
  File "/usr/share/ibus-indic-table/engine/tabcreatedb.py", line 296, in <module>
    main ()
  File "/usr/share/ibus-indic-table/engine/tabcreatedb.py", line 220, in main
    db.update_ime ( attributes )
  File "/usr/share/ibus-indic-table/engine/tabsqlitedb.py", line 310, in update_ime
    for attr,val in attrs:
  File "/usr/share/ibus-indic-table/engine/tabcreatedb.py", line 177, in attribute_parser
    attr,val = unicode (l,"utf-8").strip().split ('==')
ValueError: need more than 1 value to unpack


Version-Release number of selected component (if applicable):
ibus-indic-table-1.3.1-1.fc15

How reproducible:
everytime

Steps to Reproduce:
1. wget https://fedorahosted.org/releases/i/n/indic-typing-booster/marathi-typing-booster-0.0.1.tar.gz
2. add '=' in VALID_INPUT_CHARS in marathi-inscript.txt
3. make
  
Actual results:
it is giving error

Expected results:
it should accept '=' as a valid input character

Additional info: