DB: Use precision and scale instead of length for decimal

Use precision and scale for oc_mozilla_sync_wbo.modified column. Make it
DECIMAL(12,2).

See #71
Add function for more DB log details

Add a function which add the SQLSTATE and the database error info to
database output debug logs.
Use writeLogDbError() for verbose SQL errors

Use Utils::writeLogDbError() instead of Utils::writeLog() when a
database error occurs. This will add the SQLSTATE error code and an
error description to the debug log output.
Compare database result with ===

Compare result from database query with three equal signs (===) to make
sure the result returned is a boolean.

Additionally, use is_null() to check for null values.
Make URL parsing more robust

Create a URL object to make the parsing of the path and URL parameters
more robust.
Merge pull request #92 from owncloud/log_dont_output_wrong_error

Don't output wrong errors in the log
HTML: Use <p> and <br> instead of <table>

To avoid the hover effect use <p> in combination with <br/>.
Removed some <p>'s, h3 instead of strong
Removed duplicate information in HTML

Removed duplicate and needless information from settings and admin
template.
Merge pull request #93 from owncloud/html_dont_use_tables

HTML: Use <p> and <br> instead of <table>, template design improvements
Updated l10n template
[tx-robot] updated from transifex
Use correct === instead of is_null()

When checking if a WBO is already in the database, use the correct ```
fetchRow() === false``` instead of ```is_null()```. The function
```fetchRow()``` returns the boolean ```false``` when no (more) row(s)
are in the result set.
[tx-robot] updated from transifex
[tx-robot] updated from transifex
Merge pull request #99 from owncloud/correct_wbo_insert_update_check

Use correct === instead of is_null()
Merge pull request #80 from owncloud/db_modified_decimal_precision_scale

DB: Use precision and scale instead of length for decimal
Push version to v1.4, update CHANGELOG
[tx-robot] updated from transifex
[tx-robot] updated from transifex