CHANGES IN VERSION 0.2.1
------------------------
 o register the grid.echo.meme to fix R check <2018-09-18, Mon>
 o density parameter for pdf or svg image <2018-04-19, Thu>

CHANGES IN VERSION 0.2.0
------------------------
 o better vjust <2018-04-08, Sun>

CHANGES IN VERSION 0.1.0
------------------------
 o font_import <2017-12-06, Wed>
   + packed pokemon and bubble fonts for demo

CHANGES IN VERSION 0.0.7
------------------------
 o text shadow <2017-10-26, Thu>
   + bgcolor = 'black' by default, can change to NULL to disable this feature
   + r = 0.2 by default, increase/decrease the value to increase/decrease the shadow text
 o change to using Impact font by default <2017-10-26, Thu>
 o remove gridGraphics dependency for easy installation <2017-10-26, Thu>
   + <https://stackoverflow.com/questions/46938429/installing-meme-package-in-r>
 o mmplot and mm_caption to mimic the ggplot grammar for fun <2017-10-24, Tue>

CHANGES IN VERSION 0.0.6
------------------------
 o initial release
   + meme and meme_save
   + print, plot and + method
   + memeGrob to convert the meme object to grob
     - compatible with grid, ggplot2, ggimage and cowplot
   + asp function calculate the aspect ratio of image