add .idea and build into gitignore
added GLSurfaceView into the main activity
modified gitignore to ignore .idea/misc.xml
Merge branch 'add-opengles-framework'
Merge branch 'master' of https://github.com/pan-long/Android3DVisualisationTool
ignore .idea
remove .idea from .gitignore
Merge pull request #1 from pan-long/remove-idea-folder-from-gitignore

remove .idea from .gitignore
only track source files and configuration files
resolved conflicts in gitignore file
remove unused methods