JaxEdit release 0.27

[Z.H.]

New JaxEdit release of version 0.27 is out with the following changes:

- present beamer document in main window

- support changing beamer themes

- add example select in header bar

- show version number in header bar

- add loading image when loading content

- disable file opening when initializing editor

- support using jaxedit with https protocol

- remove unusable export button in presentation

- clean up styles code for all buttons

- fix problem of different newline characters

- fix problem of empty parameter with \doumentclass

Please visit JaxEdit's homepage for more details: http://jaxedit.com/