Fixed url to deps file at main.jade, fixed `deps` & `build` task
Added base of sql-92 code generator, fixed creating columns with spaces

Added core of generator for common SQL (sql-92). Fixed creating column
with name containing spaces (spaces are replaced with underscores). Fixed
`watch:coffee` and `coffee2closure` task.
Fixed sql92 definition, added generating foreign keys code

Fixed sql92 definition json. Added generating foreing keys code for each
table that contains foreign key. Changed relation model to contain
fk -> pk columns mapping instead of separated fks and pks columns ids.
Added dialog for generated sql, setting title for relation and table dialogs
Added extending of defs, routes test, grouping of data types

Database definitions can extend another definition. Fixed db definitons
(type exactly). Added base for routes testing. Column's types grouped by
its type (according to sql specification).
Added own extend for definitons, changed managment of database definitions

Own implmentation of function for extending objects (especially db definition
objects) was added. Changed managing of database definitions to better way.
Added server side tests.
Moved `defs` dir to `lib`, added ignoring Gruntfile for coffee task
Fixed path to defs, added renaming duplicated columnd

When column is adding or updating, check if its name is unique, otherwise
add suffix to column name to distinguish it from others.
Fixed generating sql for relation (fks) and making relation name
Fixed generating foreign key constraints, fixed `coffee:watch` task

Foreign key on composite key cant be defined for each key separately but
have to be defined for all keys (of one relation) at once. Fixed list
of files to watch for `watch:coffee` task.
Fixed making of unique constraint name

Constraint name is unique at one `generate` proccess.
Updated Readme and changed version to 0.4.0

Added new known issues, marked as a resolved some issues.
v0.4.0 - Added sql generator, extending of definitions, changed defs managment

- fixed url to deps file at main.jade, fixed `deps` & `build` task
- added generator of sql code for common SQL (sql-92) and dialog for show this
  code
- fixed creating columns with names containing whitespaces
- added renaming of columns duplicated table columns
- added extending of databases definitions
- list of col types in table dialog grouped by its type (according to sql spec)
- fixed some Gruntfile tasks