Screenpro2

What's Changed
* minor changes in docs
* fix a bug in `fastq2count` in https://github.com/ArcInstitute/ScreenPro2/pull/55


**Full Changelog**: https://github.com/ArcInstitute/ScreenPro2/compare/v0.2.11...v0.2.12

What's Changed
* introduce `counter` module, see 42
* clarify references to elements in sgRNA library in https://github.com/ArcInstitute/ScreenPro2/pull/48
* improve core functionalities for CLI in https://github.com/ArcInstitute/ScreenPro2/pull/53


**Full Changelog**: https://github.com/ArcInstitute/ScreenPro2/compare/v0.2.10...v0.2.11

What's Changed
* major reformatting and introduce alpha version of CLI in https://github.com/ArcInstitute/ScreenPro2/pull/44
* update `plotReplicateScatter` function in https://github.com/ArcInstitute/ScreenPro2/pull/46


**Full Changelog**: https://github.com/ArcInstitute/ScreenPro2/compare/v0.2.9...v0.2.10

What's Changed
* support cas12-screens – https://github.com/ArcInstitute/ScreenPro2/pull/40, #39
* improve `ngs` module
* enable processing fastq files from single, dual, or multiplexed Cas9 and Cas12 screens
* introduce `cas9` and `cas12` submodules


**Full Changelog**: https://github.com/ArcInstitute/ScreenPro2/compare/v0.2.8...v0.2.9

What's Changed
* Improve NGS module 38
* Support both single-guide and dual-guide library design 37
(i.e. V2 and V3 genome-scale dCas9 screen platforms)
* Write and improve test modules
* Improve doc and license files


**Full Changelog**: https://github.com/ArcInstitute/ScreenPro2/compare/v0.2.7...v0.2.8

* introduce `ngs` module to process fastq files and generate count matrix
* add missing features to support single-guide-design screens (i.e. V2 CRISPRi/a screens)