use t::Utils.pm
Strict argument validation for Teng::Plugin::Count.
It detects $db->count('table_name', \%condition).
Merge pull request #102 from nekokak/fix/strict_validation_for_plugin_count

Strict argument validation for Teng::Plugin::Count.
[BUG FIX]Throw exception if the table has no primary keys.
version++
fix problem when using Schema::Loader and new method is overrided
Merge pull request #104 from Songmu/fix/override-new-and-loader

fix problem when using Schema::Loader and method `new` is overrided
Named argument description in POD maybe typo.
Merge pull request #107 from kuriyama/pod-typo

Named argument description in POD maybe typo.
set/get method for set_column/get_column with deflating/inflating
Add document for set/get
Append Spellunker.
Merge branch 'implement-set-get'
add is_changed
revert unnecessary changes
check value are defined
Refactor Teng::Row

Defines:
- $self->{_get_column_cached} is container of inflated values
- $self->{_dirty_columns} is container of un-updated values (will be updated by `update()`)
- $self->{row_data} is current values on database (from select query)

Issues:
- update() also called `call_deflate` method. Now, This is integrated to `set` method (only `set` method call `call_deflate`.
- set() and get() call set_column() and get_column() for expandability.
Update Document.
Fix mysql tests.
Fix POD.