Added three more cell types

Changes in styles and add CSV option

Changes in function WriteCSV

Fix delimiter in writeCSV

Create function to write single CSV line

Improve writeCsvLine

Fix WriteCsvLine

Feature/add delimiter in function

Print subhead in reports

Fix subheader for CSV

[t:DCWIbRRX] upgraded phpunit and added first test case

[t:DCWIbRRX] added travis integration

[t:DCWIbRRX] added properties to xlsx file

[t:DCWIbRRX] added merged cells to writer

[t:DCWIbRRX] added freeze rows and cols

[t:DCWIbRRX] added custom columns widths

[t:DCWIbRRX] added row options (height, collapsed and hidden)

[t:DCWIbRRX] added row borders

…braces

…ccess

[t-C65jJpnq] Remove array and string offset access syntax with curly braces

[t-lTBFjwvE] Upgrade travis PHP to diaginose deprecated warnings

…ngs"

This reverts commit 9857934.

…h curly braces"

This reverts commit 26d8a73.

This reverts commit 9868fb3.

This reverts commit 01590d6.

This reverts commit 7ed899f.

This reverts commit 60efe0c.

This reverts commit 450f8d0.

This reverts commit 522453e.

This reverts commit 0b25c50.

This reverts commit 1d6a457.

…mits

Revert not in production commits

[t-lTBFjwvE] Update phpunit and fix curly brackets access